% sfmath.sty by Olaf Dietrich (odt@dtrx.de)

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{sfmath}[2001/08/16 v0.1 sans serif maths]


% This is a simple package for sans serif maths in documents.
%
% It's not working particularly well or typographically satisfying.
%
% Usage: \usepackage{sfmath}
%
% This package should work with pdflatex and produce documents
% with Postscript Type 1 Fonts. If you use other Postscript fonts
% (pslatex.sty, times.sty, helvet.sty, ...) then include sfmath.sty
% _after_ these packages.
%
% Functionality is limited by the intention to work without additionally
% defined (virtual) fonts; instead, only standard fonts are used.


% BUGS/LIMITATIONS/PROBLEMS:
%
% * In many constellations with Postscript fonts (pslatex.sty,
%   helvet.sty, ...) the upper-case greek letters are not chosen
%   correctly within \mathrm, \mathbf, \mathit, ... (because
%   they should be part of OT1-encoded fonts but are not included
%   in these standard postscript fonts).
%
% * Bold math symbols are not always available (e. g. with pslatex.sty)
%   or at least not slanted (e. g. with cmss fonts), so better don't
%   use bold maths with this package.
%
% * What is the desired behavior of \mathrm, \mathbf, \mathit, ...?
%   Currently, all these commands switch to a sans serif font.
%
% * Some symbols have serifish shapes (\sum, \prod, probably more) and
%   are not changed.
%
% * Lower-case greek letters are not available in sans serif shape
%   (they don't have real serifs, but cannot be expected to harmonize with
%   with the sans serif latin letters).
%
% * Is this the Right Way to do it? Or would it be preferable to define
%   one or two new math _versions_ (sans, sansbold), such that formulas
%   are switched to sans by \mathversion{sans}?
%
% * some more ...


% HERE WE GO:

% Change font for digits and "operators" (\sin, \exp, ...)
% to default sans serif font

\SetSymbolFont{operators}{normal}{OT1}{\sfdefault}{m}{n}
\SetSymbolFont{operators}{bold}{OT1}{\sfdefault}{bx}{n}


% Most special math symbols remain unmodified (and many of those
% don't have serifs); however all letters (A-Z, a-z) are
% explicitely changed to the sans serif version (again
% default sans serif font).
%
% Unfortunately, there is no standard slanted+bold sans serif font
% available (as Postscript Type 1 font), so try an upright
% version (may be better than nothing).

\DeclareSymbolFont{SFMath}{OT1}{\sfdefault}{m}{sl}
\SetSymbolFont{SFMath}{normal}{OT1}{\sfdefault}{m}{sl}
\SetSymbolFont{SFMath}{bold}{OT1}{\sfdefault}{bx}{n}
\DeclareMathSymbol{A}{\mathalpha}{SFMath}{`A}
\DeclareMathSymbol{B}{\mathalpha}{SFMath}{`B}
\DeclareMathSymbol{C}{\mathalpha}{SFMath}{`C}
\DeclareMathSymbol{D}{\mathalpha}{SFMath}{`D}
\DeclareMathSymbol{E}{\mathalpha}{SFMath}{`E}
\DeclareMathSymbol{F}{\mathalpha}{SFMath}{`F}
\DeclareMathSymbol{G}{\mathalpha}{SFMath}{`G}
\DeclareMathSymbol{H}{\mathalpha}{SFMath}{`H}
\DeclareMathSymbol{I}{\mathalpha}{SFMath}{`I}
\DeclareMathSymbol{J}{\mathalpha}{SFMath}{`J}
\DeclareMathSymbol{K}{\mathalpha}{SFMath}{`K}
\DeclareMathSymbol{L}{\mathalpha}{SFMath}{`L}
\DeclareMathSymbol{M}{\mathalpha}{SFMath}{`M}
\DeclareMathSymbol{N}{\mathalpha}{SFMath}{`N}
\DeclareMathSymbol{O}{\mathalpha}{SFMath}{`O}
\DeclareMathSymbol{P}{\mathalpha}{SFMath}{`P}
\DeclareMathSymbol{Q}{\mathalpha}{SFMath}{`Q}
\DeclareMathSymbol{R}{\mathalpha}{SFMath}{`R}
\DeclareMathSymbol{S}{\mathalpha}{SFMath}{`S}
\DeclareMathSymbol{T}{\mathalpha}{SFMath}{`T}
\DeclareMathSymbol{U}{\mathalpha}{SFMath}{`U}
\DeclareMathSymbol{V}{\mathalpha}{SFMath}{`V}
\DeclareMathSymbol{W}{\mathalpha}{SFMath}{`W}
\DeclareMathSymbol{X}{\mathalpha}{SFMath}{`X}
\DeclareMathSymbol{Y}{\mathalpha}{SFMath}{`Y}
\DeclareMathSymbol{Z}{\mathalpha}{SFMath}{`Z}
\DeclareMathSymbol{a}{\mathalpha}{SFMath}{`a}
\DeclareMathSymbol{b}{\mathalpha}{SFMath}{`b}
\DeclareMathSymbol{c}{\mathalpha}{SFMath}{`c}
\DeclareMathSymbol{d}{\mathalpha}{SFMath}{`d}
\DeclareMathSymbol{e}{\mathalpha}{SFMath}{`e}
\DeclareMathSymbol{f}{\mathalpha}{SFMath}{`f}
\DeclareMathSymbol{g}{\mathalpha}{SFMath}{`g}
\DeclareMathSymbol{h}{\mathalpha}{SFMath}{`h}
\DeclareMathSymbol{i}{\mathalpha}{SFMath}{`i}
\DeclareMathSymbol{j}{\mathalpha}{SFMath}{`j}
\DeclareMathSymbol{k}{\mathalpha}{SFMath}{`k}
\DeclareMathSymbol{l}{\mathalpha}{SFMath}{`l}
\DeclareMathSymbol{m}{\mathalpha}{SFMath}{`m}
\DeclareMathSymbol{n}{\mathalpha}{SFMath}{`n}
\DeclareMathSymbol{o}{\mathalpha}{SFMath}{`o}
\DeclareMathSymbol{p}{\mathalpha}{SFMath}{`p}
\DeclareMathSymbol{q}{\mathalpha}{SFMath}{`q}
\DeclareMathSymbol{r}{\mathalpha}{SFMath}{`r}
\DeclareMathSymbol{s}{\mathalpha}{SFMath}{`s}
\DeclareMathSymbol{t}{\mathalpha}{SFMath}{`t}
\DeclareMathSymbol{u}{\mathalpha}{SFMath}{`u}
\DeclareMathSymbol{v}{\mathalpha}{SFMath}{`v}
\DeclareMathSymbol{w}{\mathalpha}{SFMath}{`w}
\DeclareMathSymbol{x}{\mathalpha}{SFMath}{`x}
\DeclareMathSymbol{y}{\mathalpha}{SFMath}{`y}
\DeclareMathSymbol{z}{\mathalpha}{SFMath}{`z}


% Take capital greek letters from cmss; other sans serif fonts
% like helvetica don't have capital greeks, so here cmss is
% taken instead of \sfdefault. Unfortunately, this does not work
% within the alphabet commands \mathrm, \mathsf, ...
%
% I prefer slanted capital greeks, however, usually LaTeX uses
% upright letters; if you prefer the standard behavior, substitute
% the third following line by:
%
% \SetSymbolFont{SFMathGreek}{normal}{OT1}{cmss}{m}{n}

\DeclareSymbolFont{SFMathGreek}{OT1}{cmss}{m}{sl}
\SetSymbolFont{SFMathGreek}{normal}{OT1}{cmss}{m}{sl}
\SetSymbolFont{SFMathGreek}{bold}{OT1}{cmss}{bx}{n}
\DeclareMathSymbol{\Gamma}{\mathalpha}{SFMathGreek}{"00}
\DeclareMathSymbol{\Delta}{\mathalpha}{SFMathGreek}{"01}
\DeclareMathSymbol{\Theta}{\mathalpha}{SFMathGreek}{"02}
\DeclareMathSymbol{\Lambda}{\mathalpha}{SFMathGreek}{"03}
\DeclareMathSymbol{\Xi}{\mathalpha}{SFMathGreek}{"04}
\DeclareMathSymbol{\Pi}{\mathalpha}{SFMathGreek}{"05}
\DeclareMathSymbol{\Sigma}{\mathalpha}{SFMathGreek}{"06}
\DeclareMathSymbol{\Upsilon}{\mathalpha}{SFMathGreek}{"07}
\DeclareMathSymbol{\Phi}{\mathalpha}{SFMathGreek}{"08}
\DeclareMathSymbol{\Psi}{\mathalpha}{SFMathGreek}{"09}
\DeclareMathSymbol{\Omega}{\mathalpha}{SFMathGreek}{"0A}


% Define new behavior for math alphabet commands

\SetMathAlphabet{\mathrm}{normal}{OT1}{\sfdefault}{m}{n}
\SetMathAlphabet{\mathrm}{bold}{OT1}{\sfdefault}{bx}{n}

\SetMathAlphabet{\mathnormal}{normal}{OT1}{\sfdefault}{m}{sl}
\SetMathAlphabet{\mathnormal}{bold}{OT1}{\sfdefault}{bx}{n}

\SetMathAlphabet{\mathsf}{normal}{OT1}{\sfdefault}{m}{n}
\SetMathAlphabet{\mathsf}{bold}{OT1}{\sfdefault}{bx}{n}

\SetMathAlphabet{\mathbf}{normal}{OT1}{\sfdefault}{bx}{n}
\SetMathAlphabet{\mathbf}{bold}{OT1}{\sfdefault}{bx}{n}

\SetMathAlphabet{\mathit}{normal}{OT1}{\sfdefault}{m}{sl}
\SetMathAlphabet{\mathit}{bold}{OT1}{\sfdefault}{m}{sl}


% Define new math alphabet command \mathsl

\DeclareMathAlphabet{\mathsl}{OT1}{\sfdefault}{m}{sl}
\SetMathAlphabet{\mathsl}{bold}{OT1}{\sfdefault}{m}{sl}


\endinput