Week

I am trying to draw a manifold using tikz. The best way I can think of is to give several points and generates smooth lines connecting those points. Here is my draft: \documentclass{article} \usepackage{amsmath,amssymb,amsthm} \usepackage{tikz} \begin{document} \begin{tikzpicture} \draw[thick] plot [smooth cycle, tension=1] coordinates { (-2.5,0) (-1.6,1) (0,0.55) (1.6,1) (2.5,0) (1.6,-1) (0,-0.55) (-1.6,-1) }; \draw[thick] (-1.85, -0.05) to[out=-30, in=210] (-0.95, -0.05); \draw[thick] (-1.7, -0.1) to[out=45, in=135] (-1.1, -0.1); \end{tikzpicture} \end{document} The lines are not very smooth. Is there a way to make the lines more smooth? Or is there a better strategy to draw this? Thanks in advance.

I would like to create a fast/optimized fully expandable function that counts the number of spaces in an argument: \documentclass{article} \begin{document} \countspaces{ A B } % Should return 3 (1 is ok too if leading and trailing spaces are removed) \countspaces{A \mycommand B} % Should return 2 (\mycommand is not expanded) \countspaces{A {a b c} B} % Should return 2 (spaces inside groups are not counted) \end{document} Explicit spaces should be counted too. How to achieve that?

\documentclass[a4paper,12pt, scheme = plain]{ctexart} \usepackage{amsmath,enumerate} \usepackage[export]{adjustbox} % uses graphicx \usepackage{graphicx} \usepackage{xcolor} \usepackage[margin = 1.5cm]{geometry} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \usepackage{tcolorbox} \tcbuselibrary{skins,xparse,breakable,listings} \tcbset{% colback = white, colframe = black, title filled = false, colbacktitle = white, % 框的背景 enhanced, breakable }%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \NewTColorBox[ auto counter, number freestyle = {Example \,\noexpand\arabic{\tcbcounter} }, ]{question}{ O{}mo }{ fonttitle = \bfseries, title = \thetcbcounter: #2, % 显示source coltitle = black, % 标题的颜色 (默认白色背景！！！！！) before lower = {\textbf{Solution:} \par}, #1 }%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \usepackage{multicol} % cover page multicol \setlength{\columnsep}{3cm} \setlength{\columnseprule}{1pt} \def\columnseprulecolor{\color{blue}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \def\d{{\rm d}} \newcommand{\qaq}{\quad \text{and} \quad} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{document} \begin{question}{Integrating $\sin^2(x)$ and $\cos^2(x)$} Find \[ \int \sin^2(x) \, \d x \qaq \int \cos^2(x) \, \d x \] \tcblower%% \phantom{aaa} \begin{multicols}{2} \begin{align*} \int \sin^2(x) \, \d x &= \int \frac{1}{2} - \frac{1}{2} \cos(2x) \, \d x \\ &= \frac{1}{2}x - \frac{1}{4} \sin(2x) + \text{constant} \end{align*} \begin{align*} \int \cos^2(x) \, \d x &= \int \frac{1}{2} + \frac{1}{2} \cos(2x) \, \d x \\ &= \frac{1}{2}x + \frac{1}{4} \sin(2x) + \text{constant} \end{align*} \end{multicols} \end{question} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{enumerate} \item \phantom{aaa} \begin{question}{Integrating $\sin^2(x)$ and $\cos^2(x)$} Find \[ \int \sin^2(x) \, \d x \qaq \int \cos^2(x) \, \d x \] \tcblower%% \begin{multicols}{2} \begin{align*} \int \sin^2(x) \, \d x &= \int \frac{1}{2} - \frac{1}{2} \cos(2x) \, \d x \\ &= \frac{1}{2}x - \frac{1}{4} \sin(2x) + \text{constant} \end{align*} \begin{align*} \int \cos^2(x) \, \d x &= \int \frac{1}{2} + \frac{1}{2} \cos(2x) \, \d x \\ &= \frac{1}{2}x + \frac{1}{4} \sin(2x) + \text{constant} \end{align*} \end{multicols} \end{question} \end{enumerate} \end{document} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% The normal case is okish, except that the margin is a bit over. And in the enumerate environment, it gets even worse. In both cases, the horizontal baselines do not seem to agree either...

It's very difficult to make a perfect line that lies on exact circle. This is my full work: \documentclass[tikz,border=1pt]{standalone} \usepackage{tikz} \usepackage{calligra} \usepackage[T1]{fontenc} \begin{document} \begin{tikzpicture}[line width=1pt] \path[use as bounding box] (-5.6,-1.2) rectangle (6.4,7.2); % Circle \draw (2.6,3.0) circle (3.1); % Secant line P-T-U \draw (-5.0,0.1) -- (4.7,5.6); % Chords \draw (2.6,2.3) -- (1.2,1.7); % short chord near S \draw (1.2,1.7) -- (4.0,1.4); % S to V \draw (4.0,1.4) -- (4.7,5.6); % V to U % Angle at S \draw (1.2,1.7) ++(0.55,0) arc[start angle=0,end angle=123,radius=0.55]; % Angle at V \draw (4.0,1.4) ++(-0.55,0) arc[start angle=180,end angle=95,radius=0.55]; % Labels \node[font=\fontsize{34}{34}\selectfont] at (-5.0,-0.4) {$P$}; \node[font=\fontsize{34}{34}\selectfont] at (0.2,2.9) {$T$}; \node[font=\fontsize{34}{34}\selectfont] at (5.2,5.9) {$U$}; \node[font=\fontsize{34}{34}\selectfont] at (4.3,0.4) {$V$}; \node[font=\fontsize{34}{34}\selectfont] at (0.9,0.7) {$S$}; % Angle labels \node[font=\fontsize{28}{28}\selectfont] at (2.0,2.5) {$123^\circ$}; \node[font=\fontsize{28}{28}\selectfont] at (3.6,2.0) {$85^\circ$}; \end{tikzpicture} \end{document} and this is the result: What I want: Please along with full MWE ready to copy paste, could you explain, what the trick is and what to add and where to add, so that I can also learn? T.I.A.

As a teacher, you might find this question relatable should you be bothered by making sure that the sum of marks is a certain number when you make an exam. Since I believe LaTeX has control flow, I think it would be great to have a feature to count how many marks I have made so far. So, in this particular document, if it is possible, could I have a mini program that would print a number of sum of the marks? If I exceed the number of max marks, it will give a warning that been printed out below the instruction. just like if else condition. To ilustrate it, Suppose my first problem gives [3] marks, second problem has [4] marks, third problem has [1] mark and the last problem has [6] marks. I want a command to print the sum of them in a sentence like this: The total mark for this paper is \mark. Is this doable? How to? I'll just provide this MWE and let you geniuses take care of it please. T.I.A. \documentclass[12pt]{article} \usepackage[a4paper,margin=1in]{geometry} \usepackage{enumitem} \usepackage{amsmath} \begin{document} %======================== % First page %======================== \begin{center} {\Large \textbf{Sample Examination Paper}}\\[1em] {\large Mathematics}\\[2em] \end{center} \noindent \textbf{Candidate Name:} \rule{10cm}{0.4pt} \vspace{2em} \noindent \textbf{Instructions} \begin{enumerate}[leftmargin=2em] \item Write your name clearly in the space provided above. \item Answer \textbf{all five questions}. \item Write your answers in the spaces provided in this question paper. \item If you need additional space, use lined paper and attach it securely to this paper. \item You may use an HB pencil for graphs and diagrams. \item You should show all necessary working clearly. \item The total mark for this paper is \textbf{19}. \end{enumerate} \vfill \begin{center} \textit{Turn over for the first question} \end{center} \newpage %======================== % Questions %======================== \noindent \textbf{1.} Solve the equation \[ 3x - 7 = 11. \] \begin{flushright} [3] \end{flushright} \vspace{5cm} \noindent \textbf{2.} Expand and simplify \[ (x+2)(x-5). \] \begin{flushright} [4] \end{flushright} \vspace{5cm} \noindent \textbf{3.} A triangle has base $8$ cm and height $5$ cm. Calculate its area. \begin{flushright} [1] \end{flushright} \vspace{5cm} \noindent \textbf{4.} Differentiate \[ y = 4x^3 - 2x + 6. \] \begin{flushright} [5] \end{flushright} \vspace{5cm} \noindent \textbf{5.} The first three terms of a sequence are \[ 2,\ 5,\ 8,\ \dots \] Find the 10th term of the sequence. \begin{flushright} [6] \end{flushright} \vspace{5cm} \end{document} As you can see there. It is still a manual writing "19". so there, perhaps how to create command such as \mark. so it would print 19 by itself, because the LaTeX does the maths automatically. And if it exceeds 19, then print WARNING: TOTAL MARKS EXCEED 19.

how to compile Chinese in ltx-talk by Luatex？ \DocumentMetadata{} \documentclass{ltx-talk} % --- FONT SETTINGS --- % No need to load fontspec or unicode-math; ltx-talk already did. \setmainfont{Times New Roman} % Use STIX Two Math to match the "Times" look for your equations \setmathfont{STIX Two Math} \usepackage{luatexja-fontspec} \setmainjfont{times new roman} \begin{document} \begin{frame}{Sparse Recovery} 李白李白李白李白李白李白 \begin{itemize} \item \textbf{Riemannian Gradient:} $\nabla_{\mathcal{M}} f(x)$. \item \textbf{Sparsity:} Utilizing the $\ell^1$ norm for signal recovery. \end{itemize} \end{frame} \end{document}

The following mwe does not compile using make4ht in texlive 2026 mwe \documentclass{article} \usepackage{amsmath} \begin{document} \begin{align*} 1 & 2\\ 3 & 4 \end{align*} \end{document} call make4ht mwe question What configuration options do I need to adjust to make this compile?

I'm working on a document that contains quite a lot of tables. In many of these tables, some columns have normal text, while other columns have other things (e.g. inline images, math formulae, etc) that are taller than a normal line of text. With a normal tabular environment, the text ends up on the same baseline as the larger things, which doesn't look good. I would prefer it be vertically centered, so that the midline of the text lines up with the midline of the larger things. I've seen the tabularray package suggested, but it looks like that uses a very different syntax from a normal tabular, and I have many tables to update and a deadline in two days. I'm open to switching if there's a straightforward way to convert tabulars into tabularrays without changing anything about the default appearance or behavior, but otherwise, I'm worried about the dimensions changing. So: is there some way to change the behavior of a tabular (a certain table, a certain column, even a certain cell if necessary) so that text in cells is vertically centered, without changing anything else about its dimensions and layout? MWE: \documentclass[12pt,letterpaper]{book} \usepackage{booktabs} \begin{document} \begin{table}[h] \centering \begin{tabular}{ccc} \toprule Normal & Bigger & Normal \\ \midrule Lorem & {\Huge XYZ} & Ipsum \\ \midrule Dolor & {\Huge ABC} & Sit \\ \midrule Consec & {\Huge JKL} & Tetur \\ \bottomrule \end{tabular} \end{table} \end{document} I would like the midline of the smaller text to line up with the midline of the huge text, while keeping everything else about the table the same. I've seen many questions about vertically centering text in table columns, but none of the answers I've seen allow keeping the rest of the table the same (they tend to involve switching to a different environment with different behavior). I've seen that a single-cell multicolumn will center things vertically, but adding those to every single cell in many separate tables is going to be a nightmare, so I'd prefer something I can use once per table instead of once per cell if possible.

Here below is the example code: \documentclass{article} \usepackage{unicode-math} \setmathfont{TeX Gyre Pagella Math} \begin{document} Inline $(\frac{1}{b} , \frac{1}{a})$ \[ (\frac{1}{b} , \frac{1}{a})\] \end{document} Noted that the baseline of a is abnormal when inline, but normal in display. Is that a bug or feature of TeX Gyre Pagella Math? That is also quite confusing for me that why inline and display behave quite different, is not the same a glyph was used? Any hot-fix to change the baseline in inline math for a here? Any tricks(maybe luatex?) are all welcome!

When trying to put a luadraw environment in a footer I obtain the following error Argument of \luacode@grab@lines has an extra  }. Is there any workaround? If needed, I can consider using \AddToHookNext{shipout/background} (but this is not working either). This is really related to luadraw, as replacing the luadraw code by the TikZ code compiles without problems. %!TEX TS-program = lualatex \documentclass{article} \usepackage{luadraw} \usepackage{fancyhdr} \pagestyle{fancy} % This does not work %\cfoot{% % \begin{luadraw}{} % local g = graph:new{window={0,1,0,1},margin={0,0,0,0}, bbox = false} % local L = { Z(0,0), Z(1,1) } % g:Dpolyline(L,true) % g:Show() % \end{luadraw} %} % But this works % This is the TikZ code produced by the above luadraw picture \cfoot{% \begin{tikzpicture}[line join=round]% \begin{scope}% \draw[] (0,0) -- (1,1)--cycle;% \end{scope}% \end{tikzpicture}% } \begin{document} bla blo bli \end{document} Edit. If possible I would like a solution where the luadraw environment is really executed at each page and can use \thepage as a parameter.

I am toying with luadraw and would like to have my graphic depending on \thepage for the number of iterations. I tried \\thepage, "\\thepage" or to use g:Writeln or tex.sprint but none of them worked. Minimal non-working example (inspired by the luadraw manual): %!TEX TS-program = lualatex \documentclass{article} \usepackage{luadraw} \begin{document} bla blo bli \begin{luadraw}{name=Sierpinski} local iteration = g:Writeln("\\thepage") %num? tex.sprint? local g = graph:new{window={-5,5,-5,5},margin={0,0,0,0},size={1,1}} local i = cpx.I local rand = math.random local A, B, C = 5*i, -5-5*i, 5-5*i -- triangle initial local T, niv = {{A,B,C}}, iteration for k = 1, niv do T = concat( hom(T,0.5,A), hom(T,0.5,B), hom(T,0.5,C) ) end for _,cp in ipairs(T) do g:Filloptions("full", rgb(rand(),rand(),rand())) g:Dpolyline(cp,true, "line width=0pt") end g:Show() \end{luadraw} \end{document}

I cannot seem to figure out why the \clearpage (or anything for that matter) causes the \AtEndDocument hooks to not work. The other two dont seem to ever do anything which likely means I am using them wrong. \documentclass{article} \usepackage{atveryend} \AtEndDocument{\addtocontents{toc}{\protect bla?}} \AfterLastShipout{\addtocontents{toc}{\protect bla??}} \AtVeryEndDocument{\addtocontents{toc}{\protect bla???}} \begin{document} \tableofcontents \section{blub} \clearpage \LogHook{enddocument} \end{document} The output from the log is the same regardless of the \clearpage > Document-level (top-level) code (executed last): > -> \addtocontents {toc}{\protect bla?} Edit: Added photo demonstrating how none of the hooks function as expected.

The expected output is shown in the first two. \documentclass[tikz,border=1cm]{standalone} \usetikzlibrary{calc} \begin{document} \begin{tikzpicture} \draw (0,0) foreach \a in {0,1,...,6}{-- ++({45*\a}:{sqrt(2)})} -- cycle; \end{tikzpicture} \begin{tikzpicture} \draw (0,0) -- ([turn]45:{sqrt(2)}) -- ([turn]45:{sqrt(2)}) -- ([turn]45:{sqrt(2)}) -- ([turn]45:{sqrt(2)}) -- ([turn]45:{sqrt(2)}) -- ([turn]45:{sqrt(2)}) -- ([turn]45:{sqrt(2)}) -- cycle; \end{tikzpicture} \begin{tikzpicture} \draw (0,0) foreach \i in {0,...,6} {-- ([turn]45:{sqrt(2)})} -- cycle; \end{tikzpicture} \end{document} Why doesn't the last one produce the expected output?

In this solution, Max Chernoff proposed a LuaTeX approach for customizing the hyphen character. However, it does so by replacing the hyphen char with the content given inside some predefined boxes. The content is thus fixed, not sensitive to changes in font, text style or text color. With the hook selectfont, one may reset these boxes each time the font got changed, as Max did in his answer. Is there some similar tricks that work for text style (such as \textbf, \emph) and text color (produced by \color or \textcolor)? (For instance, in the example below, it is expected to have green, italic shaped dashes.) Below is a MWE. \documentclass[landscape]{article} \usepackage{xcolor} %%%%%%%%%%%%%%%%%%%%%% %%% Implementation %%% %%%%%%%%%%%%%%%%%%%%%% %% Define the box to hold the hyphen replacement \makeatletter \newbox\example@tex@hyphen@box \newbox\example@manual@hyphen@box \AddToHook{selectfont}[auto-hyphen-box]{% %% Hyphen inserted by TeX \sbox{\example@tex@hyphen@box}{\textcolor{red}{-}}% %% Hyphen inserted manually \sbox{\example@manual@hyphen@box}{-}% }% \makeatother %% Define the Lua callback to replace hyphens with coloured versions \usepackage{luacode} \begin{luacode*} local disc_subtypes = table.swapped(node.subtypes("disc")) -- Get the box register numbers local pre_box = luatexbase.registernumber("example@tex@hyphen@box") local replace_box = luatexbase.registernumber("example@manual@hyphen@box") -- Replace the inserted hyphen nodes. luatexbase.add_to_callback("hyphenate", function(head, tail) node.hyphenating(head, tail) for n in node.traverse_id(node.id("disc"), head) do if (n.prev or {}).char == utf8.codepoint("-") then -- Probably an em- or en-dash, skip it goto continue end if n.subtype == disc_subtypes.automatic then n.pre = node.copy(tex.box[replace_box]) n.replace = node.copy(tex.box[replace_box]) else n.pre = node.copy(tex.box[pre_box]) end ::continue:: end end, "colour_hyphens") \end{luacode*} %%%%%%%%%%%%%%%%%%%%% %%% Demonstration %%% %%%%%%%%%%%%%%%%%%%%% \usepackage{fontspec} \setmainfont{TeX Gyre Pagella} \setsansfont{TeX Gyre Chorus} \newcommand{\SampleText}{% This is some-text with a-lot of hyphenated words-to demonstrate how-the discretionary hyphens-are coloured. En--dash em---dash.% } \newcommand{\SampleBox}[2]{% \parbox[t]{#1}{% #2\textcolor{green}{\emph{\SampleText}} }% } \pagestyle{empty} \setlength{\parindent}{0pt} \begin{document} \begin{tabular}{*5c} \SampleBox{5cm}{\rmfamily} & \SampleBox{5cm}{\sffamily} & \SampleBox{2cm}{\rmfamily} & \SampleBox{2cm}{\sffamily} & \SampleBox{1cm}{\rmfamily} \end{tabular} \end{document} NEWLY ADDED MWE: \documentclass{article} \usepackage{newpxtext} \usepackage{xcolor} % https://tex.stackexchange.com/a/759212 \makeatletter \newbox\example@tex@hyphen@box \newbox\example@manual@hyphen@box \AddToHook{selectfont}[auto-hyphen-box]{% %% Hyphen inserted by TeX \sbox{\example@tex@hyphen@box}{\textcolor{.!39}{-}}% %% Hyphen inserted manually \setbox\example@manual@hyphen@box=\hbox{-}% }% \makeatother \RequirePackage { luacode } \begin{luacode*} local disc_subtypes = table.swapped(node.subtypes("disc")) -- Get the box register numbers local pre_box = luatexbase.registernumber("example@tex@hyphen@box") local replace_box = luatexbase.registernumber("example@manual@hyphen@box") -- Replace the inserted hyphen nodes. luatexbase.add_to_callback("hyphenate", function(head, tail) node.hyphenating(head, tail) for n in node.traverse_id(node.id("disc"), head) do if (n.prev or {}).char == utf8.codepoint("-") then -- Probably an em- or en-dash, skip it goto continue end if n.subtype == disc_subtypes.automatic then n.pre = node.copy(tex.box[replace_box]) n.replace = node.copy(tex.box[replace_box]) else n.pre = node.copy(tex.box[pre_box]) end ::continue:: end end, "colour_hyphens") \end{luacode*} \begin{document} \textcolor{.!50}{word-with-hyphen} {\color{.!50} word-with-hyphen} \textbf{word-with-hyphen} \emph{word-with-hyphen} \end{document}

I'm trying to display a reaction with chemfig including salt of a a very complex organic anion. So far, I managed to create the structure of the anion and put it into a \figure enviroment, just to have it displayed. edit: Now with compiling code \documentclass[oneside]{scrreprt} \usepackage{graphicx} \usepackage{amsmath} \usepackage[subdued]{mathastext} \Mathastext[chem] \usepackage{chemfig} \let\chmf\chemfig \renewcommand*{\chemfig}[1]{{\MTVersion{chem}\tiny \chmf{#1}}} \setchemfig{atom sep=1.9em} %\UseTblrLibrary{booktabs} \usepackage[style=chem-angew]{biblatex} \begin{document} \newcommand{\mcfminus}{\scriptstyle{-}} \newcommand{\mcfright}[2]{#1^{#2}} \begin{figure} \chemfig{3 K^{+}} \chemleft{[} \chemfig{N ~[:270] -[:270]\mcfright{N} -[:270] =_[:330]N -[:270] -[:210]N -[:270] ( -[:330]N =^[:30] ( -[:330]\mcfright{N} -[:330] ~[:330]N ) -[:90]N =^[:150] ) =_[:210]N -[:150] ( -[:210]\mcfright{N} -[:210] ~[:210]N ) =_[:90]N -[:30] ( -[:330]\phantom{N} ) =_[:90]N ( -[:30] )} \chemright{]^{\text{3-}}} \end{figure} \end{document} I want to add the cation (3 K^{+}) before the brackets, at the height of the middle of the Anion, as it is usual with salts in chemistry (and further use is between \schemestart ans \schemestop) Can anyone help me how to do this? Current result:

Consider the code: \documentclass{book} \usepackage{graphicx} \usepackage{tikz} \usetikzlibrary{calc} \begin{document} \thispagestyle{empty} \begin{center} \begin{tikzpicture} \fill[red] rectangle (8,6); \foreach \k in {0,30,...,360} \node at ($(4,3)+(\k:2)$) {\includegraphics[width=1.7em]{example-image-a}}; \end{tikzpicture} \end{center} \end{document} which produces: QUESTION: How may I modify this code in order produce an ellipse (instead of circle) of images? Thank you.

Consider the following code: \documentclass{article} \usepackage{tikz} \usetikzlibrary{% decorations.text,% mindmap,% } \begin{document} \begin{tikzpicture} \path[ adddecrev/.style={% postaction={decorate, decoration={text along path, text={##1}, raise=3pt, }}}, small mindmap, ] node (norm) [root concept, concept, adddecrev={AAA AAA|\hskip 7.5pt| ||AAAAA AAA{\kern10ptA}A AA AA}] {AAAAAAAAA} [counterclockwise from=120] % removing this child eliminates the warnings child { node [concept, adddecrev={X{\kern-2ptX}{\kern-1ptX}{\kern4ptX}{\kern0ptX}X|\hskip8pt| ||X{\kern-2ptX}X{\kern-1ptX}{\kern-1ptX} X{\kern-3ptX}{\kern-1ptX}l{\kern-1ptX}|\hskip-2pt|X||{\kern-1ptX}|\hskip4pt|X||{\kern-2ptX}|\hskip-2pt|X|| }] {MMMMMMMM} } ; \end{tikzpicture} \end{document} In TL2020, this compiles without complaint for either pdfLaTeX or LuaLaTeX. In TL2025 or 2026, it complains Missing character: There is no A in font nullfont! In TL2024, the complaint is Missing character: There is no @ in font nullfont! In TL2022 and TL2023, the complaint is Missing character: There is no ? in font nullfont! In TL2021, the complaint is Missing character: There is no > in font nullfont! What causes these differences? Usually the nullfont warnings relate directly to problematic characters in the source. The A suggests that might be the case, except that removing the X line makes the problem disappear. Moreover, for earlier installations, the characters complained of bear no obvious relation to the input and I'm not sure where they are coming from or what the problem is. I also can't see anything obviously wrong with the code specifying the text for the decoration, despite rereading the relevant part of the manual. What is happening here? Is my code erroneous? If so, how can I correct it? In any case, is there a way to avoid the problem with a current TeX Live?

I would need your help to draw a surface of genus three like in the picture I attached. More specifically, I aim to draw a torus (surface of genus one) and below the surface of genus three realised by mean of some surgeries on the surface. I already drawn the torus by myself and I need help with the genus 3 surface. As you can see, the torus I drew is not exactly as on paper. Could help me? I also added some notes about colours of curves. Moreover, I'd like the surface is filled with the pattern [pattern=north west lines, pattern color=pallido], where pallido is just a colour I defined in RGB (it's already in the code). In the picture I do not need the names of colours, that's only for you. Thank you in advance! \documentclass[11pt,a4wide]{article} \usepackage[latin1]{inputenc} \usepackage{fancyhdr} \usepackage{indentfirst} \usepackage{graphicx} \usepackage{newlfont} \usepackage{amssymb} \usepackage{amsmath} \usepackage{latexsym} \usepackage{lscape} \usepackage{booktabs} \usepackage{amsthm} \usepackage{lscape} \usepackage{tikz} \usetikzlibrary{patterns,hobby} \usepackage{pgfplots} \pgfplotsset{compat=1.6} \usepackage{faktor} %\faktor{A}{B} %\usepackage{pictexwd,dcpic} \usepackage{pgf,tikz} \usepackage{pgfplots} \pgfplotsset{compat=1.18} \usetikzlibrary{arrows.meta} \usetikzlibrary{decorations.markings} \usetikzlibrary{bending} \usetikzlibrary{patterns} \usetikzlibrary{intersections, calc} \usetikzlibrary{decorations.pathmorphing} \usepackage{soul} \usepackage{rotating} \usepackage[margin=3cm]{geometry} \usepackage{enumitem} \usepackage{color} \usepackage{hyperref} \definecolor{smoked}{RGB}{216, 212, 204} \definecolor{mauve}{RGB}{200, 55, 171} \definecolor{apricot}{RGB}{250, 144, 4} \definecolor{sky}{RGB}{66, 169, 244} \definecolor{plum}{RGB}{76, 0, 102} \definecolor{forest}{RGB}{90,145,120} \definecolor{sand}{RGB}{180,160,120} \begin{document} \begin{figure}[h!] \centering \begin{tikzpicture}[scale=2, every node/.style={scale=0.875}] \definecolor{pallido}{RGB}{221,227,227} \pattern [pattern=north west lines, pattern color=pallido] (0,0) ellipse (3cm and 2cm); \fill [white] (0,0) ellipse (1cm and 0.66cm); \draw[thin, black] (0,0) ellipse (3cm and 2cm) (0,0) ellipse (1cm and 0.66cm); \draw[orange] (0,0) ellipse (2cm and 1.25cm); %\draw[blue] (0,0) arc (030:060:2.5cm and 1.5cm); \draw[blue] (0,0) +(30:2.4 and 1.6) arc [start angle=30, end angle=60, x radius=2.4, y radius=1.6]; \draw[blue] (0,0) +(210:2.4 and 1.6) arc [start angle=210, end angle=240, x radius=2.4, y radius=1.6]; \draw[violet] (0,0) +(120:1.2 and 0.8) arc [start angle=120, end angle=150, x radius=1.2, y radius=0.8]; \draw[violet] (0,0) +(300:1.2 and 0.8) arc [start angle=300, end angle=330, x radius=1.2, y radius=0.8]; \draw[red ] (0 ,-0.66) to[bend left ] (0,-2); \draw[sky ] (0 , 0.66) to[bend left ] (0, 2); \draw[thin, red, dashed] (0 ,-0.66) to[bend right] (0,-2); \draw[thin, sky, dashed] (0 , 0.66) to[bend right] (0, 2); \fill ( 0.2,-1.25) circle (1pt); \fill (-0.2, 1.25) circle (1pt); \fill[violet] (0,0) +(120:1.2 and 0.8) circle (0.5pt); \fill[violet] (0,0) +(150:1.2 and 0.8) circle (0.5pt); \fill[violet] (0,0) +(300:1.2 and 0.8) circle (0.5pt); \fill[violet] (0,0) +(330:1.2 and 0.8) circle (0.5pt); \fill[blue] (0,0) +(030:2.4 and 1.6) circle (0.5pt); \fill[blue] (0,0) +(060:2.4 and 1.6) circle (0.5pt); \fill[blue] (0,0) +(210:2.4 and 1.6) circle (0.5pt); \fill[blue] (0,0) +(240:2.4 and 1.6) circle (0.5pt); \draw[black, thin] (0,0) +(030:2.4 and 1.6) circle (1pt); \draw[black, thin] (0,0) +(060:2.4 and 1.6) circle (1pt); \draw[black, thin] (0,0) +(210:2.4 and 1.6) circle (1pt); \draw[black, thin] (0,0) +(240:2.4 and 1.6) circle (1pt); \draw[violet] (0,0) +(120:1.2 and 0.8) circle (1pt); \draw[violet] (0,0) +(150:1.2 and 0.8) circle (1pt); \draw[violet] (0,0) +(300:1.2 and 0.8) circle (1pt); \draw[violet] (0,0) +(330:1.2 and 0.8) circle (1pt); \node at ( 1.75 , 1.25 ) {\(e_{1,1}\)}; \node at (-1.75 ,-1.25 ) {\(e_{1,2}\)}; \node at (-1.0625, 0.625) {\(e_{2,1}\)}; \node at ( 1.0625,-0.625) {\(e_{2,2}\)}; \end{tikzpicture} \caption{} \label{fig:hypermin} \end{figure} \end{document} My current result The picture I wish to draw:

I am trying to generate a quiz where I can generate a file answers.txt containing the id of each question, the x,y location on the page, the width,height and the answer. The macro side effects are brutal and I have no idea what is going on. The following minimal non-working example shows the error. I can try to save out the location of each one, but if I try to also print out width,height that give an error. \documentclass{article} \usepackage{xparse} \usepackage{tikz} \usepackage{zref-savepos} \newwrite\ansfile % Answer box size \newlength{\answ} \newlength{\ansh} \setlength{\answ}{36pt} \setlength{\ansh}{18pt} \newcounter{question} \newcounter{ansbox} % Parallel arrays stored as token lists \newtoks\AnsIDs \newtoks\AnsX \newtoks\AnsY \newtoks\AnsW \newtoks\AnsH \newtoks\AnsText \NewDocumentCommand{\question}{mm}{% \stepcounter{question}% \par\noindent\textbf{Q\thequestion\ (#1 pts)} #2\quad } \NewDocumentCommand{\ans}{m}{% \stepcounter{ansbox}% \edef\labelname{Q\thequestion-A\theansbox}% \zsavepos{\labelname}% \tikz[baseline]{\draw (0,0) rectangle (\answ,\ansh);}% % store in arrays \AnsIDs=\expandafter{\the\AnsIDs \labelname,}% \AnsX=\expandafter{\the\AnsX \zposx{\labelname},}% \AnsY=\expandafter{\the\AnsY \zposy{\labelname},}% \AnsW=\expandafter{\the\AnsW \strip@pt\answ,}% \AnsH=\expandafter{\the\AnsH \strip@pt\ansh,}% \AnsText=\expandafter{\the\AnsText #1,}% } \AtBeginDocument{% \immediate\openout\ansfile=answers.txt } \AtEndDocument{% % write arrays to file \def\IDList{\the\AnsIDs}% \def\XList{\the\AnsX}% \def\YList{\the\AnsY}% \def\WList{\the\AnsW}% \def\HList{\the\AnsH}% \def\TList{\the\AnsText}% \newcount\i \i=0 \loop \ifnum\i<\value{ansbox} % extract first item from each comma list \edef\currID{\expandafter\@firstofone\expandafter{\expandafter\@car\IDList\@nil}}% \edef\IDList{\expandafter\@gobble\IDList}% \edef\currX{\expandafter\@firstofone\expandafter{\expandafter\@car\XList\@nil}}% \edef\XList{\expandafter\@gobble\XList}% \edef\currY{\expandafter\@firstofone\expandafter{\expandafter\@car\YList\@nil}}% \edef\YList{\expandafter\@gobble\YList}% \edef\currW{\expandafter\@firstofone\expandafter{\expandafter\@car\WList\@nil}}% \edef\WList{\expandafter\@gobble\WList}% \edef\currH{\expandafter\@firstofone\expandafter{\expandafter\@car\HList\@nil}}% \edef\HList{\expandafter\@gobble\HList}% \edef\currA{\expandafter\@firstofone\expandafter{\expandafter\@car\TList\@nil}}% \edef\TList{\expandafter\@gobble\TList}% % write to file \immediate\write\ansfile{\currID\space \currX\space \currY\space \currW\space \currH\space \currA}% \advance\i by 1 \repeat \immediate\closeout\ansfile } \begin{document} \question{10}{What is $2+2$?} \ans{4} \question{5}{What is $3+5$?} \ans{8} \end{document} The log file is: This is pdfTeX, Version 3.141592653-2.6-1.40.22 (TeX Live 2022/dev/ Debian) (preloaded format=pdflatex 2026.2.22) 7 MAR 2026 14:37 entering extended mode restricted \write18 enabled. %&-line parsing enabled. **mintest5.tex (./mintest5.tex LaTeX2e <2021-11-15> patch level 1 L3 programming layer <2022-01-21> (/usr/share/texlive/texmf-dist/tex/latex/base/article.cls Document Class: article 2021/10/04 v1.4n Standard LaTeX document class (/usr/share/texlive/texmf-dist/tex/latex/base/size10.clo File: size10.clo 2021/10/04 v1.4n Standard LaTeX 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An MWS is as follows. \documentclass{ctexart} \usepackage{amsmath} \makeatletter %change English parenthesis for Chinese parenthesis \def\tagform@#1{\maketag@@@{（\ignorespaces#1\unskip\@@italiccorr）}} %\newcommand{\eqref}[1]{\textup{\tagform@{\ref{#1}}}} \makeatother \begin{document} 测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字。我们有如下结论： \begin{equation} y=x^2+7x+9\text{。} \end{equation} 测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字。 \end{document} To change English parenthesis for Chinese parenthesis in equation numbers, I revised the definition of \tagform@ is amsmath. While since there are some spaces after the Chinese parenthesis, the Chinese parenthesis are not aligned to the right side. So is there anyway to fix this?

I am working with optex 1.17, which comes with TeXLive 2023. I am creating slides, but I am having a problem with the counter at the beginning, on the cover slide. The slide number appears near the lower right corner. How can I make it disappear? Am I doing something wrong? How can I customize the slide number design for the following slides? \fontfam[Fira] \slides \wideformat \load[colors] \def\author#1{\def\theauthor{#1}} \author{Titor} % Redefinimos \tit y \subtit para que solo guarden el texto % pero NO generen una página extra. \def\tit #1{\def\thetit{#1}} \def\subtit #1{\def\thesubtit{#1}} \tit{My slide} \subtit{first intent} \def\azul{\pdfliteral{0.408 0.824 0.875 rg}} \def\gris{\pdfliteral{0.4706 0.5098 0.5412 rg}} \def\negro{\pdfliteral{0 g 0 G Q}} % 2. CARÁTULA MANUAL (Sin margen) \puttext -150mm 0mm {% \vbox to 0pt{ \offinterlineskip \vskip -50mm \vbox{ {\azul\hrule height 90mm width 500mm} {\gris\hrule height 185mm width 500mm} } \vss }% } % 3. CONTENIDO USANDO LAS MACROS NEUTRALIZADAS \null \vskip -1cm %\centerline{ {\setfontsize{at45pt}\caps\rm \pdfliteral{1 1 1 rg} \thetit}%} \vskip 1.5cm %\centerline{ {\setfontsize{at19pt}\caps\it \pdfliteral{0 g} \theauthor}%} \vskip 1cm %\centerline{ {\setfontsize{at20pt}\caps\rm \pdfliteral{0.408 0.824 0.875 rg} \thesubtit}%} \vskip 2cm % {\setfontsize{at15pt}\caps\rm \pdfliteral{0 g}Presented by} \vskip 0cm {\setfontsize{at19pt}\caps\rm \pdfliteral{0 g}Me} \vfill \pg+ % 4. REGISTRO Y CONFIGURACIÓN PARA EL RESTO DE SLIDES \negro \pgbackground={} \def\HeadColor{\pdfliteral{0 g}} \pg; %%%%%%%%%%%%%%%%%%%%%%%%%5 %%%%%%%%%%%%%%%%sec title bar \newdimen\framebarheight \framebarheight=1.2cm \let\oldprintsec=\_printsec \def\_printsec#1{% % barra superior absoluta \puttext -20mm 0mm {% \vbox to0pt{ \offinterlineskip \vskip -16mm \vbox{ {\gris\hrule height 17.5mm width 500mm} %{\gris\hrule height 185mm width 500mm} } \vss } } % acercar el título a la barra \vskip-1.4cm %%%%%%%%%%%%%%%%%%%%custom sec \hbox to\hsize{ \hskip -2.5mm {\azul\setfontsize{at25pt}\caps\rm #1} \hfil \vbox to10mm{ \vfil \hbox{\picw=10mm \inspic{logo.png}} \vfil } \hskip 2.5mm } \par \vskip 6mm } %%%%%%%%%%%%%%%%%%%%%%% %\bigskip %%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%custom bullets \def\BulletColor{0.408 0.824 0.875} \_sdef{_item:X}{% {\pdfliteral{\BulletColor\space rg}\_raise.2ex\_fullrectangle{.8ex}}% \pdfliteral{0 0 0 rg}% \kern.5em } \_sdef{_item:x}{% {\pdfliteral{\BulletColor\space rg}\_raise.3ex\_fullrectangle{.6ex}}% \pdfliteral{0 0 0 rg}% \kern.4em } %%%%%%%%%%%%%%%%%%%%%%%%%% %\pageno=1 %\def\pgfoot{\hfil\the\pageno} \sec Useful links * Wikipedia: \url{https://wikipedia.org} * DuckDuckGo: \url{https://duckduckgo.org} \pg.

I have a set of entries on a nomenclature package that I would like to right-adjust the header of the group. I am able to change the font, color, etc ... but have not succeeded in moving it down to the right, even though it looks possible. In this example here, the word Sets accepts a command \textcolor{gray}{\textbf{Sets}} but NOT the command \hfill\textcolor{gray}{\textbf{Sets}}. My MWE is: \documentclass{report} \usepackage{xcolor} % With notocbasic because of: %https://tex.stackexchange.com/questions/724740/clash-between-package-ntexindy -L english -C utf8 duo-eb.idxomencl-and-possibly-polyglossia/ \usepackage[refpage,intoc,notocbasic]{nomencl} \makenomenclature \renewcommand{\nomname}{List of Symbols} \usepackage{ifthen} \setlength{\nomitemsep}{1pt} % --- REDEFINE \nomgroup TO ADD HEADERS --- \renewcommand{\nomgroup}[1]{% % Adds extra space between groups \item[\vspace{10pt}] % Check the letter assigned to the group and print the header \ifthenelse{\equal{#1}{A}}{\item[{\textcolor{gray}{\textbf{Sets}}}]}{% \ifthenelse{\equal{#1}{B}}{\item[{\textcolor{gray}{\textbf{Sequences}}}]}{% \ifthenelse{\equal{#1}{D}}{\item[{\textcolor{gray}{\textbf{O-notation}}}]}{% } } } } \begin{document} \nomenclature[A-set]{$\max X$}{maximum of a set} \nomenclature[A-set]{$\min X$}{minimum of a set} \nomenclature[A-ysup-inf]{$\liminf_{x\to a}$}{lower limit} \nomenclature[A-ysup-inf]{$\limsup_{x\to a}$}{upper limit} \nomenclature[A-ysup-inf]{$\lim_{t \to a}$}{limit when $t$ approaches $a$} \nomenclature[A-ysup-inf]{$\inf X$}{infimum of the set X} \nomenclature[A-ysup-inf]{$\sup X$}{supremum of the set X} \nomenclature[B-sequence]{$\{f_n\}$}{sequence of functions} \nomenclature[B-sequence]{$(x_n)$}{sequence of numbers} \nomenclature[B-sequence-z]{$\ell^2(N)$}{space of square summable sequences}% \nomenclature[D-o-not]{$f(x)\sim g(x)$}{assymptotically equal} \nomenclature[D-o-not]{$o(g(x))$}{Landau o-notation} \nomenclature[D-o-not]{$O(g(x))$}{Landau O-notation} \printnomenclature[3.5cm] \end{document} to be processed with: xelatex t makeindex t.nlo -s nomencl.ist -o t.nls xelatex t

I am a little bit confused with the new babel-german v3.0, where the naming convention has a breaking change: post-1996 convention is now the default one. Is it OK to still use ngerman in current documents? Would it be different with using the new german option? Should the replacement of ngerman be german or german-de/german-germany? The documentation suggests that "it is always advisable to use a more precise option such as german-de". Thus perhaps it should be safer and more stable to use german-de instead of german. For package authors passing/detecting language options, should there be any caution with this new change? (For example, shall one need to detect the version and apply different rules separately?) Thanks so much!

I am preparing a project that involves representing the Italian Parliament using a semicircle made of colored dots, as shown in the following image: I have tried to create something using the wheelchart package (page 19 of the manual), which allows generating similar charts. However, I am unable to automatically increase the number of dots per row. For example, in the figure there are 12 dots per row, but I would like a more customizable (for example 7 balls for every radius) and automatic solution to control this. I prefer big dots and not balls. \documentclass{article} \usepackage{tikz} \usepackage{wheelchart} \begin{document} \begin{tikzpicture} \pgfkeys{ /wheelchart, discrete, discrete pic={\shade[ball color=\WCvarB] (0,0) circle[radius=2pt];}, discrete sort=angle, discrete space at borders=false, start angle=180, total angle=180, value=\WCvarA } \wheelchart{ 120/blue/, 45/green/, 40/red/, 25/orange/, 10/purple/, 5/teal/ } \end{tikzpicture} \end{document}

There are various packages that will conveniently give extensible arrows with sub/superscripts. I'm aware of: amsmath (only for basic arrows) mathtools extarrows chemarrow You can of course do the same thing with TikZ or similar. I want something similar, but with no arrowheads at all. What's the best way to achieve that? I can do it with TikZ, but the mildly annoying part would be matching the standard arrow height and width. Should I figure out how to use the internal \arrowfill@ command in amsmath? My application is essentially marking a chain of edges connected in a graph, with various labels on the edges. Here's one attempt using a text em-dash. You can see that the em-dash isn't the same as the math-mode arrow. \documentclass[12pt]{amsart} \begin{document} \[ x \overset{\mathcal{U}}{\mathbin{\text{---}}} y \overset{\mathcal{U}}{\longrightarrow} z\] \end{document}

I am compiling a LaTeX document in VS Code using the LaTeX Workshop extension on Windows 11. My document uses: chemnum / chemstyle nomencl biblatex mhchem Originally my latexmk tool was configured with: -pdf However, this produced incorrect compound labels when using chemnum with a scheme environment (temporary labels such as TMP1, TMP2 were not replaced). Following advice from a previous question, I changed the compilation pipeline to: -pdfps, (see my previous question: VS Code LaTeX Workshop: how to configure settings.json when using both chemnum and nomencl?) This indeed fixes the chemnum labeling issue. However, now I cannot include PNG graphics. For example: \begin{figure} \centering \includegraphics[scale=0.8]{random.png} \caption{random} \label{fig:random} \end{figure} produces the error: Cannot determine size of graphic (no BoundingBox) (This also does not work with [width=0.5\textwidth] or when using a .pdf image instead of .png.). In the real document there are several PNG graphics. I would also like all PNG images to be included with a fixed scale=0.8. I found the following related question, but it is quite old, so perhaps there is a more up-to-date solution: Cannot determine size of graphic settings.json { "latex-workshop.latex.tools": [ { "name": "latexmk", "command": "latexmk", "args": [ "-synctex=1", "-interaction=nonstopmode", "-file-line-error", "-pdfps", "%DOC%" ] }, { "name": "makenomenclature", "command": "makeindex", "args": [ "%DOCFILE%.nlo", "-s", "nomencl.ist", "-o", "%DOCFILE%.nls" ] } ], "latex-workshop.latex.recipes": [ { "name": "latexmk → nomencl → latexmk", "tools": [ "latexmk", "makenomenclature", "latexmk" ] } ], "latex-workshop.latex.recipe.default": "latexmk → nomencl → latexmk", "latex-workshop.latex.autoBuild.run": "never", } aromatic-compounds.eps https://drive.google.com/file/d/1faCOOvd5xcVAF_KZqhx7vAI0Mqh7pmF6/view?usp=sharing main.tex \documentclass{article} \usepackage{geometry} \usepackage{graphicx} \usepackage[version=4]{mhchem} \usepackage{chemstyle} \usepackage{chemnum} \usepackage[backend=biber]{biblatex} \addbibresource{bib.bib} \usepackage{nomencl} \makenomenclature \begin{document} \nomenclature{A}{a} \printnomenclature \section{First} \cite{knuth1984texbook} \begin{scheme} \replacecmpd{benezen1} \replacecmpd{toluene1} \includegraphics[scale=0.8]{aromatic.eps} \caption{Aromatic-compounds-1} \label{aromatic-compounds-1} \end{scheme} \begin{scheme} \replacecmpd{benezen2} \replacecmpd{toluene2} \includegraphics[scale=0.8]{aromatic.eps} \caption{Aromatic-compounds-2} \label{aromatic-compounds-2} \end{scheme} \begin{figure} \centering \includegraphics[width=0.5\textwidth]{random.png} \caption{random} \label{fig:random} \end{figure} \refcmpd{benezen, toluene} \printbibliography \end{document} bib.bib @book{knuth1984texbook, title={The texbook}, author={Knuth, Donald Ervin and Bibby, Duane}, volume={15}, year={1984}, publisher={Addison-Wesley Reading} }

I'm using: \documentclass{book} \usepackage{makeidx} \makeindex \begin{document} Test\index{Test} \newpage test\index{test} \end{document} after running makeindex, output generated as: \begin{theindex} \item Test, 1 \item test, 2 \end{theindex} Is this possible to ignore the case sensitivity and generate the output as \item Test 1, 2?

This question is a followup of a previous question of mine that David kindly answered with the following example: \documentclass{article} \usepackage{csquotes} \def\test#1{% \setbox0\hbox{#1}% \usebox{0}% \directlua{ local nn=0 for n in node.traverse_glyph(tex.box[0].head) do nn=n.char end if nn==8221 then tex.print("\string~yes") else tex.print("\string~no") end }} \begin{document} \begin{enumerate} \item \test{“Foo”} \item \test{\enquote{Bar}} \item \test{xyz} \end{enumerate} \ExplSyntaxOff \end{document} I'd like to expl3-ify this MCE and here is the first step which works nicely: \begin{filecontents*}[overwrite]{myfile.lua} function closing_double_quote(glyph) local nn=0 for n in node.traverse_glyph(glyph) do nn=n.char end if nn==8221 then tex.print("yes") else tex.print("~no") end end \end{filecontents*} \documentclass{article} \usepackage{csquotes} \ExplSyntaxOn \lua_now:n{ require('myfile') } \cs_new_protected:Nn \__mymodule_closing_double_quote:n { \setbox0\hbox{#1} \usebox{0} : \c_space_tl \lua_now:n{ tex.write(closing_double_quote(tex.box[0].head)) } } \begin{document} \begin{enumerate} \item \__mymodule_closing_double_quote:n {“Foo”} \item \__mymodule_closing_double_quote:n {\enquote{Bar}} \item \__mymodule_closing_double_quote:n {xyz} \end{enumerate} \end{document} What remains is: \setbox0\hbox{#1} \usebox{0} that could be expl3-ified as follows: \hbox_set:Nn \l_tmpa_box { #1 } \box_use:N \l_tmpa_box But what would be the equivalent of box[0] in the Lua code: tex.write(closing_double_quote(tex.box[0].head))

Is it possible to set the vertical space between two subtables as in Table 2 in the following MWE, but using something more "automatic" than setting a \vspace manually? \documentclass{book} \usepackage{subcaption} \subcaptionsetup[table]{position=top} \begin{document} \begin{table}[ht]\centering \caption{Table caption} \begin{subtable}{\linewidth}\centering \caption{First subtable caption} \begin{tabular}{cc} \hline a & b \\ c & d \\ \hline \end{tabular} \end{subtable} \begin{subtable}{\linewidth}\centering \caption{Second subtable caption} \begin{tabular}{cc} \hline e & f \\ g & h \\ \hline \end{tabular} \end{subtable} \end{table} \begin{table}[ht]\centering \caption{Table caption} \begin{subtable}{\linewidth}\centering \caption{First subtable caption} \begin{tabular}{cc} \hline a & b \\ c & d \\ \hline \end{tabular} \end{subtable}\vspace{10pt} \begin{subtable}{\linewidth}\centering \caption{Second subtable caption} \begin{tabular}{cc} \hline e & f \\ g & h \\ \hline \end{tabular} \end{subtable} \end{table} \end{document} Maybe this is a trivial question, but I found only the \vspace (or similar) answers.

With kpfonts, \not\supseteq becomes \supsetneq, which is not desirable: Expected result should look like: This appears to be a bug, because \not\subseteq looks fine. However, before the package gets fixed, is there any temporary way to fix this behavior? \documentclass{article} % \usepackage{kpfonts} % \usepackage{unicode-math} \usepackage{kpfonts-otf} \begin{document} \( \not\supseteq \) \end{document}