[Tex/LaTex] Using symbols from the arevmath package without changing the entire mathematics font

fontsmath-mode

I know this question is very similar, but most everything there is centered on MnSymbol, but I am trying to use or "obtain" three symbols using the arevmath package (I am using pdfLaTeX and MiKTeX):

\documentclass{article}
\usepackage{arevmath}
\begin{document}
The important symbols: $\Sampi, \Qoppa$ and $\stigma$. The problem: $30+40+\phi=0$.
\end{document}

produces:
enter image description here

On the other hand,

\documentclass{article}
\begin{document}
Needed symbols: \texttt{\textbackslash Sampi,\textbackslash Qoppa}, and \texttt{\textbackslash stigma}. No problem: $30+40+\phi=0$.
\end{document}

produces:
enter image description here

Is there a way to get or use these symbols without completely ruining the look of the other mathematical formulas I am trying to use? I tried using wrisym as well, but it did not compile. I have looked at a number of other fairly similar questions, but I could not find anything that I could apply directly to the problem I'm currently facing.

Best Answer

Something like this? This takes a maths alphabet. You can avoid this if necessary but if you want several symbols from the font, it is more straightforward this way.

\documentclass{article}
\DeclareSymbolFont{extraitalic}      {U}{zavm}{m}{it}
\DeclareMathSymbol{\Qoppa}{\mathord}{extraitalic}{161}
\DeclareMathSymbol{\qoppa}{\mathord}{extraitalic}{162}
\DeclareMathSymbol{\Stigma}{\mathord}{extraitalic}{167}
\DeclareMathSymbol{\Sampi}{\mathord}{extraitalic}{165}
\DeclareMathSymbol{\sampi}{\mathord}{extraitalic}{166}
\DeclareMathSymbol{\stigma}{\mathord}{extraitalic}{168}

\begin{document}
The important symbols: $\Sampi, \Qoppa$ and $\stigma$. No problem: $30+40+\phi=0$.
\end{document}

mix

Not necessarily typographically ideal, perhaps, but it does get you those symbols without changing the rest.

Explanation

I started by just seeing what the package arev provided. arevsymbols.tex sounded likely so I started there. (Otherwise, I'd have used grep to search for one of the commands you mentioned.) I got the definitions of the commands from that file:

\DeclareMathSymbol{\Qoppa}{\mathord}{extraitalic}{161} % uni03D8
\DeclareMathSymbol{\qoppa}{\mathord}{extraitalic}{162} % uni03D9
\DeclareMathSymbol{\Sampi}{\mathord}{extraitalic}{165} % uni03E0
\DeclareMathSymbol{\sampi}{\mathord}{extraitalic}{166} % uni03E1
\DeclareMathSymbol{\Stigma}{\mathord}{extraitalic}{167} % uni03DA
\DeclareMathSymbol{\stigma}{\mathord}{extraitalic}{168} % uni03DB

So now I just needed to know what extraitalic was. I used grep for this on just the .sty files:

grep extraitalic tex/latex/arev/*.sty

This gave me this:

tex/latex/arev/arevmath.sty:\DeclareSymbolFont{extraitalic}      {U}{zavm}{m}{it}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@a}  {true}}{}{\DeclareMathSymbol{a}{\mathalpha}{extraitalic}{139}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@i}  {true}}{}{\DeclareMathSymbol{i}{\mathalpha}{extraitalic}{140}
tex/latex/arev/arevmath.sty:                                      \DeclareMathSymbol{\imath}{\mathalpha}{extraitalic}{111}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@I}  {true}}{}{\DeclareMathSymbol{I}{\mathalpha}{extraitalic}{138}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@f}  {true}}{}{\DeclareMathSymbol{f}{\mathalpha}{extraitalic}{154}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@l}  {true}}{}{\DeclareMathSymbol{l}{\mathalpha}{extraitalic}{141}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@u}  {true}}{}{\DeclareMathSymbol{u}{\mathalpha}{extraitalic}{142}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@v}  {true}}{}{\DeclareMathSymbol{v}{\mathalpha}{extraitalic}{143}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@w}  {true}}{}{\DeclareMathSymbol{w}{\mathalpha}{extraitalic}{144}}
tex/latex/arev/arevmath.sty:\ifthenelse{\equal{\var@x}  {true}}{}{\DeclareMathSymbol{x}{\mathalpha}{extraitalic}{145}}
tex/latex/arev/arevmath.sty:\DeclareMathSymbol{\origIota}{\mathord}{extraitalic}{30} % same as \origI
tex/latex/arev/arevmath.sty:\DeclareMathSymbol{\varIota}{\mathord}{extraitalic}{138} % same as \varI

and the first line,

\DeclareSymbolFont{extraitalic}      {U}{zavm}{m}{it}

was the one I was looking for.

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