Arial font, and non-scalable mathcal fonts

arialfontsmath-fonts

I have to use the Arial font and I do that as follows (Helvetica is close to Arial):

\renewcommand{\rmdefault}{phv} % Helvetica
\renewcommand{\sfdefault}{phv} % Helvetica

The other solution I have found is to use the commands:

\usepackage{helvet}
\renewcommand{\familydefault}{\sfdefault}

Both work and as far as I can see, both solutions look the same. I use the following packages for math fonts because it looks nice with Arial fonts:

\usepackage[amsthm,mathsfit]{libertinust1math}

I want to modify some font sizes as follows (it looks nice with 1, but it looks nicer with 1.2):

\makeatletter
\newcommand*{\LinuxLibertineT@scale}{1.2}
\makeatother

The issue I have is that the \mathcal fonts are apparently not scalable as far as I understand the problem. Is there any way to overcome the problem ? (I know nothing about fonts sorry)

Best Answer

In libertinust1math.sty, \mathcal font is stixcal.

\documentclass{article}
\usepackage[amsthm,mathsfit]{libertinust1math}
\makeatletter
\newcommand*{\LinuxLibertineT@scale}{1.2}
\makeatother
\DeclareFontShape{U}{stixcal}{m}{n} {<->s*[1.2]stix-mathcal}{}
\DeclareFontShape{U}{stixcal}{b}{n} {<->s*[1.2]stix-mathcal-bold}{}
\begin{document}
test $t$ $\mathcal{A}$
\end{document}

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[Tex/LaTex] New locally defined mathcal font for math equations

I’m not sure I understand your question properly. If you need to use two different calligraphic alphabets in the same document, the easiest way to accomplish this is to load one as \mathcal and the other as \mathscr in mathalpha. (On older installations, you might need to use its older name, mathalfa.)

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[cal = pxtx, scr = dutchcal]{mathalpha}

\begin{document}

pxtx: \( \mathcal{ABC} \)

dutchcal: \( \mathscr{ABC} \)

\end{document}

However, I’m not sure whether you meant that you need to use three very-similar calligraphic alphabets in the same document. (Unless it’s a specimen of different math scripts, I can’t imagine why.)

In that case, use \DeclareMathAlphabet with the proper family and encoding names. I adapted the code in mathalpha.sty:

\documentclass{article}
\usepackage[T1]{fontenc}

% Based on the code from mathalpha.sty:

  \DeclareFontFamily{U}{dutchcal}{\skewchar \font =45}
  \DeclareFontShape{U}{dutchcal}{m}{n}{
    <-> dutchcal-r}{}
  \DeclareFontShape{U}{dutchcal}{b}{n}{
    <-> dutchcal-b}{}
  \DeclareMathAlphabet{\mdutchcal}{U}{dutchcal}{m}{n}
  \SetMathAlphabet{\mdutchcal}{bold}{U}{dutchcal}{b}{n}
  \DeclareMathAlphabet{\mdutchbcal} {U}{dutchcal}{b}{n}

  \DeclareFontFamily{U}{txcal}{\skewchar \font =45}
  \DeclareFontShape{U}{txcal}{m}{n}{
    <-> txr-cal}{}
  \DeclareFontShape{U}{txcal}{b}{n}{
    <-> txb-cal}{}
  \DeclareMathAlphabet{\mtxcal}{U}{txcal}{m}{n}
  \SetMathAlphabet{\mtxcal}{bold}{U}{txcal}{b}{n}
  \DeclareMathAlphabet{\mtxbcal} {U}{txcal}{b}{n}

\begin{document}

pxtx: \( \mtxcal{ABC} \)

dutchcal: \( \mdutchcal{ABC} \)

mathcal: \( \mathcal{ABC} \)

\end{document}

If one of your packages is changing \mathcal and you need to restore it, see this question. You can also save the original definition of \mathcal with \let and \renewcommand\mathcal.

Be aware that legacy LaTeX only allows you to declare a limited number of math alphabets. One way to work around this is to load a script font as a text font (for example, a Fraktur font from oldgerm) and use it in math mode by wrapping it in \text from amsmath.

In the modern toolchain with unicode-math, you can use \setmathfontface to create as many new math alphabets as you want. You can also \setmathfont[range=cal, Scale=MatchUppercase]{Some Font} and \setmathfont[range=scr, Scale=MatchUppercase]{Another Font} to load a new script alphabet. Indeed, if you don’t do one or the other, they’ll be set to the same face by default.

Lowercase \mathscr and \mathcal letters

It is true that the (vast?) majority of math-script and math-calligraphic font shapes provide only uppercase letters. For some math font packages that provide these font shapes for lowercase letters as well, please see the pages 8 thru 10 in the user guide of the mathalpha package.

Do also note that the terminology of what's a "calligraphic" or a "script" font shape isn't fully standardized. One working definition is that "script" letters are more heavily sloped than "calligraphic" letters are; however, do be aware that this is just one, and certainly not universally accepted, possible definition.

After perusing the user guide of the mathalpha package in the manner suggested above, I came up with the following choice: esstix for \mathcal and \boondox for \mathscr. Again, let me emphasize that this is just one particular possible choice. Others may come up with other choices.

\documentclass{article}
\usepackage[scr=boondox,  % heavily sloped
            cal=esstix]   % slightly sloped
           {mathalpha}
\begin{document}
$\mathscr{abcABC} \quad \mathcal{abcABC}$
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] New locally defined mathcal font for math equations

Lowercase \mathscr and \mathcal letters

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