<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">% Poor person's blackboard bold.
% January 6, 1988.
%
% Robert Messer
% Department of Mathematics
% Albion College
% Albion, MI 49224
% Bitnet: RAM@ALBION
% Improved to work together with LaTeX (e.g., `\H' replaced with `\bbH')
% by Michael Hoppe, 12-DEZ-1992.

\def\bbA{{\rm\kern.22em
    \vrule width.02em height0.5ex depth 0ex
    \kern-.24em A}}
\def\bbB{{\rm I\kern-.25em B}}
\def\bbC{{\rm\kern.24em
    \vrule width.02em height1.4ex depth-.05ex
    \kern-.26em C}}
\def\bbD{{\rm I\kern-.25em D}}
\def\bbE{{\rm I\kern-.25em E}}
\def\bbF{{\rm I\kern-.25em F}}
\def\bbG{{\rm\kern.24em
    \vrule width.02em height1.4ex depth-.05ex
    \kern-.26em G}}
\def\bbH{{\rm I\kern-.25em H}}
\def\bbI{{\rm I\kern-.25em I}}
\def\bbJ{{\rm\kern.19em
    \vrule width.02em height1.47ex depth 0ex
    \kern-.21em J}}
\def\bbK{{\rm I\kern-.25em K}}
\def\bbL{{\rm I\kern-.25em L}}
\def\bbM{{\rm I\kern-.25em M}}
\def\bbN{{\rm I\kern-.18em N}}
\def\bbO{{\rm\kern.24em
    \vrule width.02em height1.4ex depth-.05ex
    \kern-.26em O}}
\def\bbP{{\rm I\kern-.25em P}}
\def\bbQ{{\rm\kern.24em
    \vrule width.02em height1.4ex depth-.05ex
    \kern-.26em Q}}
\def\bbR{{\rm I\kern-.21em R}}
\def\bbS{{\rm\kern.18em
    \vrule width.02em height1.47ex depth-.9ex
    \kern.12em
    \vrule width.02em height0.7ex depth 0ex
    \kern-.34em S}}
\def\bbT{{\rm\kern.45em
    \vrule width.02em height1.47ex depth 0ex
    \kern-.47em T}}
\def\bbU{{\rm\kern.30em
    \vrule width.02em height1.47ex depth-.05ex
    \kern-.32em U}}
\def\bbV{{\rm\kern.27em
    \vrule width.02em height1.47ex depth-.8ex
    \kern-.29em V}}
\def\bbW{{\rm\kern.25em
    \vrule width.02em height1.47ex depth-.9ex
    \kern.34em
    \vrule width.02em height1.47ex depth-.9ex
    \kern-.63em W}}
\def\bbX{{\rm\kern.30em
    \vrule width.02em height1.47ex depth-1ex
    \kern.12em
    \vrule width.02em height0.4ex depth 0ex
    \kern-.46em X}}
\def\bbY{{\rm\kern.25em
    \vrule width.02em height1.0ex depth 0ex
    \kern-.27em Y}}
\def\bbZ{{\rm\kern.26em
    \vrule width.02em height0.5ex depth 0ex
    \kern.04em
    \vrule width.02em height1.47ex depth-1ex
    \kern-.34em Z}}
\def\bbd{{\rm\kern.22em
    \vrule width.02em height1.0ex depth0ex
    \kern-.24em d}}

\endinput
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