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\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{mkessler-mathfont}[2022/01/30 - Collects several math fonts together]


%%% Store away the several (partially conflicting) fonts in internal macros

\let\mkessler@mathfont@none@mathcal\mathcal

\RequirePackage{mathrsfs}
\let\mkessler@mathfont@mathrsfs@mathscr\mathscr

\RequirePackage[mathscr]{eucal}
\let\mkessler@mathfont@eucal@optionmathscr@mathscr\mathscr

\RequirePackage{amsfonts}
\let\mkessler@mathfont@amsfonts@mathfrak\mathfrak

%%% Provide user commands to internally stored macros
\def\mkessler@mathfont@restorefonts{
    \let\mathcal\mkessler@mathfont@none@mathcal % Set \mathcal to default calligrapic
    \let\mathfrak\mkessler@mathfont@amsfonts@mathfrak % Set \mathfrak to mathfrak from amsfonts
    \let\mathscr\mkessler@mathfont@mathrsfs@mathscr % Set \mathscr to mathscript from mathrsfs package
    \let\mathcat\mkessler@mathfont@mathrsfs@mathscr % Set \mathcat to mathscript from mathrsfs package
    \let\mathcalo\mkessler@mathfont@eucal@optionmathscr@mathscr % Set \mathcalo (for old calligraphic) to \mathscr from [mathscr]{eucal} package
}

\AtBeginDocument{\mkessler@mathfont@restorefonts}