Week

How do I show the start of a new section, either as itself a "section slide" or even in the "body" slides? \DocumentMetadata{ lang = de, pdfstandard = ua-2, pdfstandard = a-4f, tagging=on, tagging-setup={math/setup=mathml-SE} } \documentclass{ltx-talk} \EditInstance{footer}{std}{ element-order = {title, subtitle, framenumber} } \title{My talk} \subtitle{I want to show sections} \institute{University of Stack Exchange} \date{} \begin{document} \begin{frame} \maketitle \end{frame} \section{Motivation} \begin{frame}\frametitle{Here is a frame title} Some text. \end{frame} \section{Real talk} \begin{frame}\frametitle{Here is a frame title} Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. \end{frame} \end{document}

I want to use \str_set_convert:Nnnn with Japanese chars directly in document. The MWE below has no problem in pdfLaTeX. It correctly displays E782B9. \documentclass{article} \begin{document} \ExplSyntaxOn % works in pdflatex, fails in lualatex \str_set_convert:Nnnn \l_tmpa_str {点} {utf8} {utf8/hex} \l_tmpa_str \ExplSyntaxOff \end{document} But in LuaLaTeX, it gives the error message: LaTeX Error: String invalid in escaping 'bytes': it may only contain bytes. What am I missing? How should I wrap the text to get the same result in any engine provided that "the user" can type the actual Japanese char, not some escaping sequences?

I'm going to have a printed version of my ltx-talk that won't have color. I would still like to have \alert do something, however. I think that means I should renew alert to make things bold, but I'm having trouble making that work properly: many of the options listed at How can I get bold math symbols? don't make things bold, or they cause errors if tagging is enabled. To give an example: \DocumentMetadata{} \RequirePackage{fixmath} % must come before unicode-math loaded by ltx-talk \documentclass{ltx-talk} \usepackage{bm} \usepackage{amsmath} \usepackage{amsbsy} \newcommand{\colvect}{\begin{pmatrix}x\\-1\end{pmatrix}} \begin{document} \colorlet{alert}{black} \begin{frame} \( normal \colvect alert \alert{\colvect} mathbf \mathbf{\colvect} symbf \symbf{\colvect} pmb \pmb{\colvect} % incompatible with unicode-math, tagging? mathbold \mathbold{\colvect} % requires package fixmath, conflicts with unicode-math % \boldsymbol{\colvect}\quad % error % \bm{\colvect}\quad % error \) boldmath {\boldmath\(\colvect\)} % {\setmathfont{luciole-math}\(\colvect\)} % preamble only bfseries {\bfseries\(\colvect\)} % \(\bfseries\colvect\) % invalid in math mode \bigskip normal \alert{alert} \textbf{textbf} \symbf{symbf} \pmb{pmb} {\bfseries bfseries} \end{frame} \end{document} has the output Notice that without color, \alert doesn't do anything. \symbf does a bit in math mode, but only the letter and number, not the parentheses and minus. \textbf and \bfseries succeed in text mode, so I could test \ifmmode, but I still need something in math mode. \pmb seems to work the best, but https://github.com/latex3/tagging-project/issues/1240 says that it's not working at the moment (and it appears to be intentionally broken in text mode).

After updating miktex today I get the message Undefined control sequence. \mathemptydisplaymode in the luabidi.sty. I removed miktex completely and installed it, the same result. Could you please help me? It’s a 4,000-page book in Greek, Hebrew, and Dutch that was compiled over the past three years. % !TeX TS-program = lualatex \documentclass[11pt,a4paper,twoside]{book} %%%%%%%%%%%%------following loaded before biblatex` \usepackage{fontspec} \usepackage{polyglossia} \setmainlanguage{dutch} \setotherlanguage{greek} \setotherlanguage{hebrew} %%<<-------------------Greek/Hebrew \setmainfont[Ligatures=TeX]{Charis SIL} \defaultfontfeatures{Ligatures=TeX} \newfontfamily\hebrewfont{Ezra SIL‬‬}[Script=Hebrew,Contextuals=Alternate]%\texthebrew %%Greek \newfontfamily{\greekfont}[Script=Greek, Scale=MatchUppercase, Ligatures=TeX]{SBL Greek} \begin{document} Nederlands: gewoon een zinnetje Grieks: \textgreek{Οὗτος δῶρα} Hebrew: \texthebrew{תְהֹ֑ום} \end{document}

This is my code (which I compile using LuaLatex: This is LuaHBTeX, Version 1.24.0 (TeX Live 2026) (format=lualatex 2026.4.1). % test of hrefrun \DocumentMetadata { pdfversion = 2.0, } \documentclass [ a4paper, ] {article} \usepackage{hyperref} % set options for hyperref \hypersetup { colorlinks, % give links a color runcolor = blue, % set color of links to external files } \ExplSyntaxOn % ----------------------------------------------------------------------------- % Command to replace all occurrences of a given text in a string with another given text. % % Note that the original text is not changed, this command gives as result the % processed text. % % #1 = text which needs to be processed % #2 = text to be replaced % #3 = the replacement text % ----------------------------------------------------------------------------- \NewDocumentCommand{\ReplaceText}{m m m} { \tl_set:Nn \l_tmpa_tl {#1} \tl_replace_all:Nnn \l_tmpa_tl {#2} {#3} \tl_to_str:N \l_tmpa_tl } \ExplSyntaxOff %--------------------------------------------------------------- \begin{document} % make a filename in which spaces are replaced by underscores \newcommand{\MyFilename}{\ReplaceText{./audio/Engels/one hundred.mp3}{ }{_}} \hrefrun{\MyFilename}{\MyFilename} \end{document} When I compile this code, the second parameter of \hrefrun is correct. However in the first parameter of \hrefrun is the space between 'one' and 'hundred' not replaced by an underscore. Instead of that, the space and underscore are appended after '.mp3'. See this image: How can I get the first parameter of \hrefrun to be processed correctly?

I am creating a beamerposter with linguistic examples in expex with a custom font (libertine). I originally wrote most of it using pdflatex but have to switch to lua or xetex now. However, when I do so, the spacing within the examples changes drastically. Simply loading fontspec has the same effect, so it doesn't seem to have anything to do with the font specifically. Loading neither libertine nor fontspec produces the same spacing as pdflatex. \documentclass{beamer} \usepackage{beamerposter} % loading either of these increases the spacing within expex's (cf. second picture) %\usepackage{fontspec} %\usepackage{libertine} \usepackage{expex} \begin{document} \begin{frame} \pex \a \begingl \gla text// \glb gloss// \glft `transl'// \endgl \xe \ex \begingl \gla text// \glb gloss// \glft `transl'// \endgl \xe \end{frame} \end{document} pdflatex with libertine: lualatex with libertine (same spacing with xetex and/or fontspec): lualatex without libertine or fontspec:

I want to pose a question to resolve the issue described in https://stackoverflow.com/a/32463868/32395400, by simplicial partitioning. There doesn't seem to be a precedent for this, so I made a little document: \documentclass[tikz,border=1cm]{standalone} \begin{document} \begin{tikzpicture} \foreach \ang/\col in {0/red,120/green,240/blue} { \draw[\col,ultra thick] (\ang:1) -- +(\ang-90:3) -- +(\ang+90:3); } \end{tikzpicture} \end{document}

How can I restore indentation in this setup? \documentclass{article} \usepackage[showframe]{geometry} \usepackage{marginnote,lipsum} \reversemarginpar \setlength{\marginparwidth}{1.1in} \ProvideDocumentCommand{\LetterSection}{m}{% \par \smallskip \leavevmode \marginnote{% \raggedleft \footnotesize % \sffamily % \scshape \strut #1 }[1pt]% % \ignorespaces } \begin{document} \LetterSection{test} \noindent\lipsum[1][1] \end{document}

Under normal circumstances, BibLaTeX uses the same coordinating conjunction "and" for two authors that may have their names in one script (Latin, for now) and also to join two translator names that could have their names in another script (Cyrillic in this example). You may change the scripts above to any other pair and the problem remains the same. This has the unfortunate consequence of placing a pair of names in English joined by a Russian conjunction in the text as seen here: generated by the simple MWE: \documentclass{article} \begin{filecontents}[overwrite]{isaac.bib} @BOOK{isaacson:en, author = {Isaacson, Eugene and Keller, Herbert Bishop}, title = {Analysis of Numerical Methods}, publisher = {Dover Publications}, address = {Mineola, New York}, year = {1994}, langid = {english}, } @BOOK{isaacson:ru, author = {Isaacson, Eugene and Keller, Herbert Bishop}, title = {Анализ численных методов}, author-ru = {Э. Исааксон and Х. Б. Келлер}, translator = {В. В. Пчелинцев and L. L. Пчелинцев}, publisher = {Мир}, address = {Москва}, year = {1976}, langid = {russian}, } @book{rudin:zh, author = {Walter Rudin and Elena Rudin}, title = {实分析与复分析}, translator = {戴牧民 and 张更容}, publisher = {机械工业出版社}, address = {北京}, year = {2006}, langid = {chinese-simplified}, } \end{filecontents} \usepackage{babel} \babelprovide[import, main]{american} \babelprovide[import]{russian} \babelfont{rm}{NewComputerModern10} \babelfont{sf}{NewCMSans10-Regular} \babelfont{tt}{NewCMMono10-Regular} \babelprovide[import]{chinese-simplified} \babelfont[chinese-simplified]{rm}[ Scale = MatchLowercase, ItalicFont = Noto Serif CJK SC, ItalicFeatures = {FakeSlant=0} ]{Noto Serif CJK SC} \usepackage[style=authoryear,language=auto,autolang=other]{biblatex} \addbibresource{isaac.bib} \begin{document} Citing \textcite{isaacson:en}, \textcite{isaacson:ru}, \textcite{rudin:zh}. \printbibliography \end{document} It would be desirable to: Have one conjunction to be used with the authors names (and) that would show up in the Biblio list and in the main text, that is mostly in Latin. Have another to be used with the translator names (и) or inside the record, that is mostly in Cyrillic The russian.lbx file (as all others I know of) seems to have only one coordinating conjunction. and = {{и}{и}}, Is there a way to separate them, or define a new one, to be used in the bibliographical tags?

My code snippets: \renewcommand{\chaptermark}[1]{\markboth{\scshape\chaptername\ \thechapter. #1}{}}% \renewcommand{\sectionmark}[1]{\markright{\scshape\S\thesection. #1}}% worked just fine in TeXLive 2022 (using amsbook format in LaTeX), but in TeXLive 2026 the section heads do not appear at all. I gather this is due to the changes in the way headers are handled now. Can you suggest a modern modification I can make to get section heads to appear? fancyhdr did nothing for me. EDIT: OK. Here is a short document which typesets to three pages. Using TeXLive 2022 I get a section header on p. 3; using TeXLive 2026 there is none. 🙂 \documentclass[11pt]{amsbook} \renewcommand{\chaptermark}[1]{\markboth{\scshape\chaptername\ \thechapter. #1}{}}% \renewcommand{\sectionmark}[1]{\markright{\scshape\S\thesection. #1}}% \begin{document} \chapter{Curves} \section{Examples, Arclength Parametrization} We say a vector function $f\: (a,b)\to\mathbb R^3$ is $C^k$ ($k=0,1,2,\dots$) if $f$ and its first $k$ derivatives, $f'$, $f''$, \dots, $f^{(k)}$, exist and are all continuous. We say $f$ is smooth if $f$ is $C^k$ for every positive integer $k$. A parametrized curve is a $C^3$ (or smooth) map $\alpha\: I\to\mathbb R^3$ for some interval $I=(a,b)$ or $[a,b]$ (possibly infinite). We say $\alpha$ is regular if $\alpha'(t)\ne 0$ for all $t\in I$. We can imagine a particle moving along the path $\alpha$, with its position at time $t$ given by $\alpha(t)$. As we learned in vector calculus, $$\alpha'(t) = \lim_{h\to 0}\frac{\alpha(t+h)-\alpha(t)}h$$ is the velocity of the particle at time $t$. The velocity vector $\alpha'(t)$ is tangent to the curve at $\alpha(t)$ and its length, $\|\alpha'(t)\|$, is the speed of the particle. We say a vector function $f\: (a,b)\to\mathbb R^3$ is $C^k$ ($k=0,1,2,\dots$) if $f$ and its first $k$ derivatives, $f'$, $f''$, \dots, $f^{(k)}$, exist and are all continuous. We say $f$ is smooth if $f$ is $C^k$ for every positive integer $k$. A parametrized curve is a $C^3$ (or smooth) map $\alpha\: I\to\mathbb R^3$ for some interval $I=(a,b)$ or $[a,b]$ (possibly infinite). We say $\alpha$ is regular if $\alpha'(t)\ne 0$ for all $t\in I$. We can imagine a particle moving along the path $\alpha$, with its position at time $t$ given by $\alpha(t)$. As we learned in vector calculus, $$\alpha'(t) = \lim_{h\to 0}\frac{\alpha(t+h)-\alpha(t)}h$$ is the velocity of the particle at time $t$. The velocity vector $\alpha'(t)$ is tangent to the curve at $\alpha(t)$ and its length, $\|\alpha'(t)\|$, is the speed of the particle. We say a vector function $f\: (a,b)\to\mathbb R^3$ is $C^k$ ($k=0,1,2,\dots$) if $f$ and its first $k$ derivatives, $f'$, $f''$, \dots, $f^{(k)}$, exist and are all continuous. We say $f$ is smooth if $f$ is $C^k$ for every positive integer $k$. A parametrized curve is a $C^3$ (or smooth) map $\alpha\: I\to\mathbb R^3$ for some interval $I=(a,b)$ or $[a,b]$ (possibly infinite). We say $\alpha$ is regular if $\alpha'(t)\ne 0$ for all $t\in I$. We can imagine a particle moving along the path $\alpha$, with its position at time $t$ given by $\alpha(t)$. As we learned in vector calculus, $$\alpha'(t) = \lim_{h\to 0}\frac{\alpha(t+h)-\alpha(t)}h$$ is the velocity of the particle at time $t$. The velocity vector $\alpha'(t)$ is tangent to the curve at $\alpha(t)$ and its length, $\|\alpha'(t)\|$, is the speed of the particle. We say a vector function $f\: (a,b)\to\mathbb R^3$ is $C^k$ ($k=0,1,2,\dots$) if $f$ and its first $k$ derivatives, $f'$, $f''$, \dots, $f^{(k)}$, exist and are all continuous. We say $f$ is smooth if $f$ is $C^k$ for every positive integer $k$. A parametrized curve is a $C^3$ (or smooth) map $\alpha\: I\to\mathbb R^3$ for some interval $I=(a,b)$ or $[a,b]$ (possibly infinite). We say $\alpha$ is regular if $\alpha'(t)\ne 0$ for all $t\in I$. We can imagine a particle moving along the path $\alpha$, with its position at time $t$ given by $\alpha(t)$. As we learned in vector calculus, $$\alpha'(t) = \lim_{h\to 0}\frac{\alpha(t+h)-\alpha(t)}h$$ is the velocity of the particle at time $t$. The velocity vector $\alpha'(t)$ is tangent to the curve at $\alpha(t)$ and its length, $\|\alpha'(t)\|$, is the speed of the particle. We say a vector function $f\: (a,b)\to\mathbb R^3$ is $C^k$ ($k=0,1,2,\dots$) if $f$ and its first $k$ derivatives, $f'$, $f''$, \dots, $f^{(k)}$, exist and are all continuous. We say $f$ is smooth if $f$ is $C^k$ for every positive integer $k$. A parametrized curve is a $C^3$ (or smooth) map $\alpha\: I\to\mathbb R^3$ for some interval $I=(a,b)$ or $[a,b]$ (possibly infinite). We say $\alpha$ is regular if $\alpha'(t)\ne 0$ for all $t\in I$. We can imagine a particle moving along the path $\alpha$, with its position at time $t$ given by $\alpha(t)$. As we learned in vector calculus, $$\alpha'(t) = \lim_{h\to 0}\frac{\alpha(t+h)-\alpha(t)}h$$ is the velocity of the particle at time $t$. The velocity vector $\alpha'(t)$ is tangent to the curve at $\alpha(t)$ and its length, $\|\alpha'(t)\|$, is the speed of the particle. \section{Local Theory: Frenet Frame} What distinguishes a circle or a helix from a line is their curvature, i.e., the tendency of the curve to change direction. We shall now see that we can associate to each smooth ($C^3$) arclength-parametrized curve $\alpha$ a natural ``moving frame" (an orthonormal basis for $\mathbb R^3$ chosen at each point on the curve, adapted to the geometry of the curve as much as possible). We begin with a fact from vector calculus that will appear throughout this course. Suppose $f, g: (a,b)\to\mathbb R^3$ are differentiable and satisfy $f(t)\cdot g(t)=\text{const}$ for all $t$. Then $f'(t)\cdot g(t) = -f(t)\cdot g'(t)$. In particular, $$\|f(t)\|=\text{const} \quad\text{if and only if}\quad f(t)\cdot f'(t)=0 \quad\text{for all }t\,.$$ What distinguishes a circle or a helix from a line is their curvature, i.e., the tendency of the curve to change direction. We shall now see that we can associate to each smooth ($C^3$) arclength-parametrized curve $\alpha$ a natural ``moving frame" (an orthonormal basis for $\mathbb R^3$ chosen at each point on the curve, adapted to the geometry of the curve as much as possible). We begin with a fact from vector calculus that will appear throughout this course. Suppose $f, g: (a,b)\to\mathbb R^3$ are differentiable and satisfy $f(t)\cdot g(t)=\text{const}$ for all $t$. Then $f'(t)\cdot g(t) = -f(t)\cdot g'(t)$. In particular, $$\|f(t)\|=\text{const} \quad\text{if and only if}\quad f(t)\cdot f'(t)=0 \quad\text{for all }t\,.$$ What distinguishes a circle or a helix from a line is their curvature, i.e., the tendency of the curve to change direction. We shall now see that we can associate to each smooth ($C^3$) arclength-parametrized curve $\alpha$ a natural ``moving frame" (an orthonormal basis for $\mathbb R^3$ chosen at each point on the curve, adapted to the geometry of the curve as much as possible). We begin with a fact from vector calculus that will appear throughout this course. Suppose $f, g: (a,b)\to\mathbb R^3$ are differentiable and satisfy $f(t)\cdot g(t)=\text{const}$ for all $t$. Then $f'(t)\cdot g(t) = -f(t)\cdot g'(t)$. In particular, $$\|f(t)\|=\text{const} \quad\text{if and only if}\quad f(t)\cdot f'(t)=0 \quad\text{for all }t\,.$$ What distinguishes a circle or a helix from a line is their curvature, i.e., the tendency of the curve to change direction. We shall now see that we can associate to each smooth ($C^3$) arclength-parametrized curve $\alpha$ a natural ``moving frame" (an orthonormal basis for $\mathbb R^3$ chosen at each point on the curve, adapted to the geometry of the curve as much as possible). We begin with a fact from vector calculus that will appear throughout this course. Suppose $f, g: (a,b)\to\mathbb R^3$ are differentiable and satisfy $f(t)\cdot g(t)=\text{const}$ for all $t$. Then $f'(t)\cdot g(t) = -f(t)\cdot g'(t)$. In particular, $$\|f(t)\|=\text{const} \quad\text{if and only if}\quad f(t)\cdot f'(t)=0 \quad\text{for all }t\,.$$ What distinguishes a circle or a helix from a line is their curvature, i.e., the tendency of the curve to change direction. We shall now see that we can associate to each smooth ($C^3$) arclength-parametrized curve $\alpha$ a natural ``moving frame" (an orthonormal basis for $\mathbb R^3$ chosen at each point on the curve, adapted to the geometry of the curve as much as possible). We begin with a fact from vector calculus that will appear throughout this course. Suppose $f, g: (a,b)\to\mathbb R^3$ are differentiable and satisfy $f(t)\cdot g(t)=\text{const}$ for all $t$. Then $f'(t)\cdot g(t) = -f(t)\cdot g'(t)$. In particular, $$\|f(t)\|=\text{const} \quad\text{if and only if}\quad f(t)\cdot f'(t)=0 \quad\text{for all }t\,.$$ \end{document} I hope this helps.

I have been looking into switching my lecture presentations from Beamer to ltx-talk for the automatic tagging functionality. For frame titles, the default behavior does not vertically center the text in the colored header/banner. Here is a minimum working example (most recent release of MacTeX). % !TEX TS-program = lualatex \DocumentMetadata{tagging=on} \documentclass{ltx-talk} \EditInstance{header}{std}{ background-color = blue!50, color = white, } \author{John Doe PhD} \title{An interesting title} \institute{Interesting Conference} \begin{document} \begin{frame} \maketitle[framestyle = wallpaper] \end{frame} \begin{frame} \frametitle{Frame title not vertically centered in colored header} Some text \ldots \end{frame} \end{document} Does anyone know how to achieve a frame title that is vertically centered in the header/banner when using ltx-talk?

I am using exam clas with liguistix package to create an exam paper in Marathi. As English has base line, the Devanagari script used for writing Marathi has head-line or Shiro-rekha (ꣻꣻꣻ). As in english the space for an answer is provided using an \hrulefill command which is at the position of base line of Latin characters, I wan to use Shiro-rekha for providing answering space for Marathi text. I can type the shiro-rekha character many times (like this: ꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻ) to fill the space. But it will take time and will be unevenly filled. Is there any way to use this shiro-rekha character and get filled it like a hrulefill? My MWE is as bellow: \documentclass{exam} \usepackage{linguistix} \linguistix{languages={english,marathi}} \begin{document} \makebox[\textwidth]{\textsc{संपूर्ण नाव : } ꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻꣻ} \vspace{0.2in} \makebox[\textwidth]{\textsc{Full name:}\enspace\hrulefill} \end{document}

First I tried to set the main font to Helvetica using \usepackage[scaled]{helvet} with \renewcommand\familydefault{\sfdefault}, but it didn't set the sans-serif font to Helvetica - the document was now in CM Sans Serif. I then switched to XeLaTeX and tried the following code for fontspec, but now when I save the document, after a few seconds it gives me the error in the image along with "Recipe terminated". Then if I reload the window after those errors appear (I use VSCode), the PDF is updated with whatever text I added anyway as if there was no error. Just still in CM Sans Serif instead of Helvetica. I have Helvetica installed on my computer, I can find it in C:\Windows\Fonts. \documentclass{article} \usepackage{fontspec, lipsum} \setmainfont{Helvetica} \renewcommand\familydefault{\sfdefault} \begin{document} \lipsum[1-10] \end{document}

I'm using a two-column extarticle document, without multicol. How do I make these two plots in a {figure} environment right-aligned instead of left-aligned in the column? They are a part of a nested list in my actual document so I did the same in the code here; other than the lorem ipsum, those are the same figures I'm using in my actual document. My goal with making them right-aligned is to align the left-hand side of the plots with the text following them. \documentclass[twocolumn]{extarticle} \usepackage{pgfplots, lipsum} \usepackage[margin=1cm]{geometry} \pgfplotsset{compat=1.18} \begin{document} \lipsum[1-5] \begin{enumerate} \item \begin{enumerate} \item \lipsum[1] \begin{figure} \label{fig:3sinx+2-x} \begin{tikzpicture} \begin{axis}[ xlabel=$x$, ylabel=$f(x)$, xmin=-0.5, xmax=2*pi+0.5, ymin=-6.25, ymax=6.25, xtick={0, pi/4, pi/2, 3*pi/4, pi, 5*pi/4, 3*pi/2, 7*pi/4, 2*pi}, xticklabels={$0$, , $\frac{\pi}{2}$, , $\pi$, , $\frac{3\pi}{2}$, , $2\pi$}, ytick={-6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6}, yticklabels={$-6$, , $-4$, , $-2$, , $0$, , $2$, , $4$, , $6$}, axis lines=middle, width=5.5cm, title={$f(x) = 3\sin(x)+2-x$} ] \addplot[ color=red, domain=0:2*pi, smooth ]{3*sin(deg(x)) + 2 - x}; \end{axis} \end{tikzpicture} \label{fig:3sinx+x-3} \begin{tikzpicture} \begin{axis}[ xlabel=$x$, ylabel=$f(x)$, xmin=-0.5, xmax=2*pi+0.5, ymin=-4.25, ymax=4.25, xtick={0, pi/4, pi/2, 3*pi/4, pi, 5*pi/4, 3*pi/2, 7*pi/4, 2*pi}, xticklabels={$0$, , $\frac{\pi}{2}$, , $\pi$, , $\frac{3\pi}{2}$, , $2\pi$}, ytick={-4, -3, -2, -1, 0, 1, 2, 3, 4}, yticklabels={$-4$, $-3$, $-2$, $-1$, $0$, $1$, $2$, $3$, $4$}, axis lines=middle, width=5.5cm, title={$f(x) = 3\sin(x)+x-3$} ] \addplot[ color=red, domain=0:2*pi, smooth ]{3*sin(deg(x)) + x - 3}; \end{axis} \end{tikzpicture} \end{figure} \item \lipsum[1-2] \end{enumerate} \end{enumerate} \end{document}

I am trying to graph a system of 3 inequalities in 3 dimensions. These ineuqalities are: y-z>=1/2x, x-z>=0, and x+y>=3z. Currently I am struggling to get even a basic output. My input is: \documentclass[12pt, a4paper]{article} \usepackage{float, ulem, amsmath, amsthm, amssymb, pgfplots, tikz} \pgfplotsset{width=10cm,compat=1.9} \usepgfplotslibrary{external, fillbetween} \tikzexternalize \begin{document} \begin{tikzpicture} \begin{axis}[domain=0:10,y domain=0:10] \addplot3[surf] {y-(\frac{1}{2}*x)}; \addplot3[surf] {x}; \addplot3[surf] {\frac{x+y}{3}}; \end{axis} \end{tikzpicture} \end{document} I am getting the error: "Package tikz Error: Sorry, the system call 'pdflatex -shell-escape - halt-on-error -interaction=batchmode -jobname "output-figure0" "\def\tikzexternalrealjob{output}\input{output}"' did NOT result in a usable output file 'output-figure0' (expected one of .pdf:.jpg:.jpeg:.png:). Please verify that you have enabled system calls. For pdflatex, this is 'pdflatex -shell-escape'. Sometimes it is also named 'write 18' or something like that. Or maybe the command simply failed? Error messages can be found in 'output-figure0.log'."

I have been trying to understand what is behind this warning: Package biblatex Warning: Patching footnotes failed. (biblatex) Footnote detection will not work. which is produced by, for example, this code: % !TeX program = lualatex \DocumentMetadata{ uncompress, lang=en, tagging=on, pdfstandard=UA-2, pdfstandard=A-4f, tagging-setup={math/setup={mathml-SE,mathml-AF}, extra-modules={verbatim-mo, verbatim-af}} } \documentclass[12pt]{report} \usepackage{setspace} \usepackage{biblatex} \begin{document} Example. \end{document} Searching on this forum for similar issues, I am led to believe this has to do with the (re)definition of \@footnotetext. What confounds me, however, is that I can only produce this warning if I simultaneously set up the \DocumentMetadata, include setspace, and use biblatex. In other words, if I remove either the \DocumentMetadata or setspace then I no longer get this warning. (I don't know if this is worth mentioning, but for what it's worth, I originally also use hyperref in the document where I found this issue-- its inclusion seems to have no bearing on this behavior).

While I know that I can use % to comment out a line of code, I would like to get the same result (i.e. non-compiling text) in the middle of a block of text, like this (the brackets are here just to show the example): Blabla blabla bla bla bla [some non-compiling comments] bla bla blabla blab I don't want to write something like the following (i.e splitting the text paragraph): Blabla blabla bla bla bla % some non-compiling comments bla bla blabla blab Is it possible? I guess that I'll need to use some non-compiling macro, like \nc{} but I would prefer not to use something like it. In Mathematica, we have the ability to insert non-compiling codes with (* non-compiling text *)

Consider the code: \documentclass[12pt]{book} \usepackage[paperwidth=6.00in,paperheight=9.00in,top=.5in,bottom=.5in,left=.75in,right=.5in]{geometry} \textheight=7.25in \voffset=0.35in \usepackage{lipsum,enumitem} \begin{document} \pagestyle{empty} \begin{enumerate}[label={(\Roman*.)},itemindent=1em,leftmargin=0em] \item \lipsum[12] \item \lipsum[12] \item \lipsum[12] \item \lipsum[12] \item \lipsum[12] \end{enumerate} \end{document} which produces the output: I would like to reduce the width of the enumerate items by say, a factor of .75; however, when I tried embedding the enumeration within a minipage environment, there is no pagebreak. QUESTION: How may I adjust the width of the displayed items in the enumerate environment? Thank you.

I’d like to include the skull emoji 💀 in a document compiled with pdfLaTeX but with colors similar to how it displays on my device in other contexts. I can get a skull with fontawesome, but it’s not quite the same: \documentclass{scrartcl} \usepackage{fontawesome5} \begin{document} \faSkull \end{document} creates a skull like which is black/white inverted compared to how my device normally shows 💀, where the skull is white, and the eye sockets are black. I cannot change to LuaTeX because what I am compiling is like, super large. I also tried something along the lines of \contourlength{0.5pt} and \contour{black}{\color{white}\faSkull} but that did not work well. Can anyone help get 💀 with black eye sockets on a white skull or something close to it? Thanks!

Does anyone know a way to "overlap" two disjunction (or conjunction) symbols? Almost looking like a "W". It is sometimes used in infinitary logic!

The following code snippet works, but I'm looking for a more elegant solution. Perhaps one using an inverse tree environment. \documentclass[12pt]{article} \usepackage{tikz} \begin{document} Problem: Find the next number in the following sequence:\\ 7 \quad 10 \quad 15 \quad 22 \quad 31...\\ Solution:\\ \begin{tikzpicture} \node (a) at (0,0) { 7}; \node (b) at (0:0.75) {10}; \node (c) at (0:1.50) {15}; \node (d) at (0:2.25) {22}; \node (e) at (0:3.00) {31}; \node [red] (f) at (0:3.75) {42}; \node (g) at (0.50,-1) { 3} edge [<-] (a) edge [<-] (b); \node (h) at (1.25,-1) { 5} edge [<-] (b) edge [<-] (c); \node (i) at (2.00,-1) { 7} edge [<-] (c) edge [<-] (d); \node (j) at (2.75,-1) { 9} edge [<-] (d) edge [<-] (e); \node [red] (k) at (3.50,-1) {11} edge [red] [<-] (e) edge [red] [->] (f); \node (l) at (1.00,-2) {2} edge [<-] (g) edge [<-] (h); \node (m) at (1.75,-2) {2} edge [<-] (h) edge [<-] (i); \node (n) at (2.50,-2) {2} edge [<-] (i) edge [<-] (j); \node [red] (o) at (3.25,-2) {2} edge [red] [<-] (j) edge [red] [->] (k); \node (p) at (5,-3.5) {}; \draw [->,red] (0,-3.5) .. controls +(up:1cm) and +(left:1.5cm) .. node {}(g); \end{tikzpicture} \setlength{\parskip}{0pt} \setlength{\parindent}{0pt} Compute the difference between each pair of numbers in the list.\\ Observe the pattern (every odd number beginning with 3, in this case.) \end{document}

\startuseMPgraphic{square} path p; p := fullsquare xscaled 18cm yscaled 26cm; draw p withcolor darkgray withpen pencircle scaled 2pt; \stopuseMPgraphic \defineoverlay[watermark][\useMPgraphic{square}] \setupbackgrounds[page][background=watermark] \setuppapersize[A4][A4] \usetypescript[dejavu] \setupbodyfont[dejavu,12pt] \starttext \chapter{knuth} \input knuth \chapter{zapf} \input zapf This Pdfpage was rendered with\ \Context\ mark \contextmark.\crlf It uses \texenginename\ version \texengineversion\ as engine. \stoptext On an A4 page, we can draw a border on the current page using the above code. Now I want to use an A3 page to typeset a student exam paper, and I need to draw a border on the current A3 page. I used the same code, but the result is that two borders are drawn separately on the left and right pages. Is there any way to change this? Additionally, how can we display the current page number and the total number of pages of the exam paper in the header on an A3 page? \startuseMPgraphic{square} path p; p := fullsquare xscaled 18cm yscaled 26cm; draw p withcolor darkgray withpen pencircle scaled 2pt; \stopuseMPgraphic \defineoverlay[watermark][\useMPgraphic{square}] \setupbackgrounds[page][background=watermark] \setuppapersize[A4][A3,landscape] \setuparranging[2SIDE] %[2UP] \setuplayout[margin=0pt, width=fit] \setuppagenumbering[alternative=singlesided]%{doublesided}] \usetypescript[dejavu] \setupbodyfont[dejavu,12pt] \starttext {\rm The programs } {\ss in this article } $z=f(x,y)$ {\tt using Fortran 95 language} \startformula \iint_{D} \Big(\frac{\partial Q}{\partial x}-\frac{\partial P}{\partial y} \Big) \dd x \dd y= \oint_{L } P \dd x+Q \dd y \stopformula $\sqrt{3} =\ctxlua{tex.print(math.sqrt(3))}$ \currentdate \, \currenttime \par %当前时间 %\ctxlua{context(os.date())}%调用库函数打印当前时间 This Pdfpage was rendered with\ \Context\ mark \contextmark.\crlf It uses \texenginename\ version \texengineversion\ as engine. \stoptext

See the following example: % !TEX TS-program = pdflatex \DocumentMetadata{lang=en,pdfstandard=ua-2,pdfstandard=a-4f,tagging=on,tagging-setup={math/setup=mathml-SE}} \documentclass{article} \usepackage[OT1]{fontenc} \usepackage{kantlipsum} \renewcommand{\familydefault}{\sfdefault} \begin{document} \section{Start} \kant[42] \end{document} As-is (with TexLive 2026) uses Computer Modern (cmss*.pfb), but if I remove the \usepackage[OT1]{fontenc} line, it uses Computer Modern Super (cm-super/*.pfb), hence I guess is then using T1 fontenc, and if I additionally remove the \DocumentMetadata line, then I am back to Computer Modern, the expected default in pdflatex. Was that a conscious decision? I could imagine that some tagged pdf features would not work (or not work well) with OT1 (i.e. more than generally with pdflatex)? If intentional, is it documented somewhere? I could not find it via search engines and looking at a few documents, but maybe is somewhere? Side note: The position of the text also moved in the example when activating tagged pdf (independently of fontenc).

I am using circuitikz to make 2 small diagrams with spring mass. I'd like to put a frame around each. I tried many things, such as using \fbox and \node[draw=black, inner sep=5pt]{...}; but nothing works. I keep getting errors. Below is what I have as MWE \documentclass[tikz, border=2mm]{standalone} \usepackage{circuitikz} \usetikzlibrary{calc} \usepackage{amsmath} \usetikzlibrary{patterns,hobby,decorations.pathmorphing} \usetikzlibrary{fit} \begin{document} \begin{circuitikz}[remember picture, overlay] %\draw[step=1cm, gray, very thin] (current page.south west) grid (current page.north east); \coordinate (A) at (3,-.5); \coordinate (B) at (12,-.5); %ground %\node[draw=black, inner sep=5pt]{ %does not work \pattern[pattern=north east lines] (A) rectangle ($(A)+(4,0.15)$); \draw[thick] (A) -- ($(A)+(4,0)$); \draw ($(A)+(1.5,0)$) to[spring, l_=$k$] ($(A)+(1.5,-2)$); \draw ($(A)+(2.5,0)$) to[damper, l=$c$] ($(A)+(2.5,-2)$); \draw[fill=gray!30] ($(A)+(1,-2)$) rectangle ($(A)+(3,-3)$); \node[font=\Large] at ($(A)+(2,-2.5)$) {$m$}; \draw[thin,dashed] ($(A)+(3.25,-2.5)$) -- ($(A)+(4.5,-2.5)$); \node[align=left,font=\small] at ($(A)+(5.25,-2.5)$) {equilibrium\\position}; \draw[thin, ->] ($(A)+(4,-2.5)$) -- ($(A)+(4,-3)$); \node at ($(A)+(4,-3.2)$) {$x$}; \node at ($(A)+(2,-4)$) {$\boxed{m x'' + c x' + k x = 0}$}; %}; %does not work %------------------------------------ %\fbox{ %does not work \pattern[pattern=north east lines] (B) rectangle ($(B)+(4,0.15)$); \draw[thick] (B) -- ($(B)+(4,0)$); \draw ($(B)+(2,0)$) to[spring, l_=$k$] ($(B)+(2,-2)$); \draw[fill=gray!30] ($(B)+(1,-2)$) rectangle ($(B)+(3,-3)$); \node[font=\Large] at ($(B)+(2,-2.5)$) {$m$}; \draw[thin,dashed] ($(B)+(3.25,-2.5)$) -- ($(B)+(4.5,-2.5)$); \node[align=left,font=\small] at ($(B)+(5.25,-2.5)$) {equilibrium\\position}; \draw[thin, ->] ($(B)+(4,-2.5)$) -- ($(B)+(4,-3)$); \node at ($(B)+(4,-3.2)$) {$x$}; \draw[thick, ->] ($(B)+(2,-3)$) -- ($(B)+(2,-3.5)$); \node at ($(B)+(2,-3.75)$) {$F_0 \cos(\varpi)$}; \node at ($(B)+(2,-4.5)$) {$\boxed{m x'' + k x = F_0 \cos(\varpi)}$}; %} %does not work \end{circuitikz} \end{document} Compiling with lualatex gives this I'd like to make it look like this I do not want to make 2 separate \begin{circuitikz} and put fbox or frame outside each. But want just one \begin{circuitikz} as above, and inside it, put a frame around any collection of commands I want. Is this possible to do? All examples I saw says to put frame around the whole tikz picture. But that is not what I want. May be \node[draw=black, inner sep=5pt]{...}; does not work inside circuitik?

To use CTAN one has to know what one is looking for. I would like to browse a list for packages, and (hopefully) say to myself, "that is something that may help me now or in the future". Then I would like to know what it does (usually omitted, along with the syntax, from the code). As an example: I would like a list of all the font syles (especially the ones that I never heard of) so that I can use fntsample to print out the characters. If one types "font styles" in CTAN there are only 28 hits, omitting fonts that I know exist. (I now see from answer that tug.org/FontCatalogue will work for fonts). That still leaves the myriad of other packages

N.B.: I don't know if there is a technical term for what I'm trying to describe, so I just made up "two-layer" as a proxy. I have a set of course notes that have become popular among a group of colleagues. There is a desire to have an "instructor's version" with various instructional tips and hints for solutions. OK, fine, I have all that already in various files. As I've begun writing the instructor's version, it's become clear that having two separate source files (one for student, one for instructor) is supremely annoying. Any edits I want to make to the student content must then also be copied over to the instructor file. My desire is to have one source file, but two ways to compile. One would compile the whole works, creating the instructor's version. A second would skip all the instructor addenda, leading to the the student's version. This way, edits to the body and exposition need be made only once, not twice. I have to believe this is possible. I thought about creating an instructor's environment like a newtheorem to segregate out the instructor's content, but then I don't know how to toggle on or off the inclusion of those lines (and this is probably not the smart solution, anyway). Is there a way to create two versions of a document from a single file?

The following code snippet draws a box in box for a heading. I would like some help to improve the code so that only the top right corner of the bottom box is rounded. Most of the values are currently hardcoded, as this forms part of a larger code that calls the macro \tikzspecial defines keys that are passed as options. The height of the blue top box should be 3cm, I seem to be about a couple of mm out, any help with that I would also appreciate. \documentclass[10pt,twoside]{book} \usepackage[bottom=2cm,top=2cm, left=3cm, right=4cm,showframe]{geometry} \usepackage{tikz} \usepackage{kantlipsum} \ExplSyntaxOn \makeatletter \NewDocumentCommand{\tikzspecial}{s O +m}{ %% First band \begin{tikzpicture}[remember~picture,overlay,inner~sep=0pt,outer~sep=0pt] \draw[draw=none,fill=cyan,outer~sep=0pt,inner~sep=0pt, xshift={-2cm},yshift=-\dimexpr3cm+10pt] (current~page.north~west) rectangle (\paperwidth,2.5cm); \end{tikzpicture} %% Second band with rounded corners \begin{tikzpicture}[remember~picture,overlay] \node~at~(current~page.north~west)~[yshift=-\dimexpr3cm+5.4pt,xshift=-10pt,%.3 klls corners on left anchor=south~west,inner~sep=10pt, outer~sep=0,white,fill=black, draw=none,rounded~corners=10pt,align=left, text~width=\textwidth]{\leftskip10pt \large \sffamily\LARGE\bfseries \IfBooleanTF{#1}{}{\thechapter.\space} #3\par }; \end{tikzpicture} \vspace*{4\baselineskip} \par \@afterindentfalse \@afterheading } \makeatother \ExplSyntaxOff \begin{document} \parindent=2em % simulate chapter \stepcounter{chapter} \tikzspecial*{Some Special Layout\\ Format} \kant[1-9] \end{document}

This is a follow up to this question, which asks for delimiters with thicker lines. I would like to add the option to choose the color of these delimiters, as in the following example \documentclass[]{amsart} \usepackage{color} \begin{document} \newcommand{\Red}[1]{\textcolor{red}{#1}} \newcommand{\mynorm}[1]{\Red{\lvert} #1 \Red{\rvert}} $\mynorm{v}$ \end{document} which produces this: Thus my question is how to add this color parameter to egreg's answer to the linked question. I tried to do it myself, with no success so far.

I have been experimenting with an essentially empty tex file to see how long it takes pdflatex just to get started. On one of the fastest 2026 machines around, an Apple M4, here is what I get: Baseline (just \documentclass): 1.4s biblatex: +1.9s (the single biggest offender) microtype: +0.6s tikz: +0.6s hyperref: +0.5s All heavy packages combined: 4.8s total (3.4s of package overhead) I am now wondering whether I should regress to the older Bibtex (or Natbib??) and dump biblatex. More generally, I understand that there are formats that can replace the entire article class. Alas, what I really would like is a format that can replace just a set of style files --- or better yet, a way to "cache" a whole set of my standard style files that I am always including. Is this possible? Any ideas how to keep my beloved pidflatex output and have it move faster? pointers appreciated. /iaw

A style guide demands: heading numbers end in a period; headings titles do not hang off the number. Example of desired output: In the past I could accomplish this by modifying \@seccntformat and \@hangfrom: \documentclass{article} \makeatletter \def\@seccntformat#1{\csname the#1\endcsname.\enskip} \def\@hangfrom#1{\noindent#1} \makeatother \begin{document} \section{My section title with an extremely long title spanning multiple lines} \subsection{My subsection title with an extremely long title spanning multiple lines} \end{document} But in TeX Live 2026 with \DocumentMetadata{tagging=on}, the hanging indent reappears! I believe the tagging code enables the socket sec/title/hang whose default plug does not call \@hangfrom. I could mimic the kernel plug with my own variant and assign it to the socket: % Put the following inside the `\makeatletter`/`\makeatother` block. \ExplSyntaxOn \cs_new_protected:Npn \__tag_set_title_NOHANG:nNnn #1 #2 #3 #4 %#1 level, %#2 boolean: nonumber? (will be later \l__head_nonumber_bool) %#3 formated number /hang space %#4 title { \protected@edef\l__tag_sec_tmpa_tl {#4} \tagstructbegin{tag=\UseStructureName{sec/#1/title},title-o={\l__tag_sec_tmpa_tl}} \cs_if_exist_use:N \__tag_gincr_para_begin_int: \bool_if:NF #2 { \tagstructbegin{tag=\UseStructureName{sec/#1/number}} } \setbox\@tempboxa\hbox{{#3}} \bool_set_false:N \l__tag_para_bool %\hangindent \wd\@tempboxa\noindent %%% <-- REMOVED \noindent %%% <-- INSERTED \bool_set_true:N \l__tag_para_bool \bool_if:NTF #2 { \box\@tempboxa } { \tagmcbegin{} \tag_mc_reset_box:N\@tempboxa \box\@tempboxa \tagmcend \tagstructend } \tagmcbegin{} } \NewTaggingSocketPlug{sec/title/hang}{myoverlay} { \__tag_set_title_NOHANG:nNnn #1 } \AssignTaggingSocketPlug{sec/title/hang}{myoverlay} \ExplSyntaxOff This feels fragile. Is there a better approach? Now the plot thickens. I am actually trying to use TeX Live 2026 lualatex-dev to benefit from a bug fix. But in lualatex-dev with \DocumentMetadata (with or without tagging=on), it seems \@seccntformat is no longer called, thus there is no longer a period after the section number. I believe lualatex-dev is bringing templates into play (in the file latex-lab-testphase-sec-template.sty). I am new to templates. How do I adjust the templates to put a period after the number? And do templates then perhaps also provide a less fragile way to eliminate \hangindent so I no longer need to replace \__tag_set_title_hang (earlier part of this post)?