Warning: this is an htmlized version!
The original is here, and
the conversion rules are here.
% (find-LATEX "2021ski.tex")
% (defun c () (interactive) (find-LATEXsh "lualatex -record 2021ski.tex" :end))
% (defun C () (interactive) (find-LATEXsh "lualatex 2021ski.tex" "Success!!!"))
% (defun D () (interactive) (find-pdf-page      "~/LATEX/2021ski.pdf"))
% (defun d () (interactive) (find-pdftools-page "~/LATEX/2021ski.pdf"))
% (defun e () (interactive) (find-LATEX "2021ski.tex"))
% (defun u () (interactive) (find-latex-upload-links "2021ski"))
% (defun v () (interactive) (find-2a '(e) '(d)))
% (defun cv () (interactive) (C) (ee-kill-this-buffer) (v) (g))
% (find-pdf-page   "~/LATEX/2021ski.pdf")
% (find-sh0 "cp -v  ~/LATEX/2021ski.pdf /tmp/")
% (find-sh0 "cp -v  ~/LATEX/2021ski.pdf /tmp/pen/")
%   file:///home/edrx/LATEX/2021ski.pdf
%               file:///tmp/2021ski.pdf
%           file:///tmp/pen/2021ski.pdf
% http://angg.twu.net/LATEX/2021ski.pdf
% (find-LATEX "2019.mk")

\documentclass[oneside,12pt]{article}
\usepackage[colorlinks,citecolor=DarkRed,urlcolor=DarkRed]{hyperref} % (find-es "tex" "hyperref")
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{pict2e}
\usepackage[x11names,svgnames]{xcolor} % (find-es "tex" "xcolor")
%\usepackage{colorweb}                 % (find-es "tex" "colorweb")
%\usepackage{tikz}
%
% (find-dn6 "preamble6.lua" "preamble0")
\usepackage{proof}   % For derivation trees ("%:" lines)
\input diagxy        % For 2D diagrams ("%D" lines)
\xyoption{curve}     % For the ".curve=" feature in 2D diagrams
%
\usepackage{edrx15}               % (find-LATEX "edrx15.sty")
\input edrxaccents.tex            % (find-LATEX "edrxaccents.tex")
\input edrxchars.tex              % (find-LATEX "edrxchars.tex")
\input edrxheadfoot.tex           % (find-LATEX "edrxheadfoot.tex")
\input edrxgac2.tex               % (find-LATEX "edrxgac2.tex")
%
%\usepackage[backend=biber,
%   style=alphabetic]{biblatex}            % (find-es "tex" "biber")
%\addbibresource{catsem-slides.bib}        % (find-LATEX "catsem-slides.bib")
%
% (find-es "tex" "geometry")
\usepackage[a6paper,landscape]{geometry}
\begin{document}

\catcode`\^^J=10
\directlua{dofile "dednat6load.lua"}  % (find-LATEX "dednat6load.lua")

% %L dofile "edrxtikz.lua"  -- (find-LATEX "edrxtikz.lua")
% %L dofile "edrxpict.lua"  -- (find-LATEX "edrxpict.lua")
% \pu

%\printbibliography

% $f: A \underset{g}{\monicto} B$


%D diagram ??
%D 2Dx     100 +30
%D 2D  100 A0  A1
%D 2D
%D 2D  +25 B0  B1
%D 2D
%D ren A0 A1 ==> A B
%D ren B0 B1 ==> A' B'
%D
%D (( A0 A1 >-> .plabel= b \llcorner{f}\lrcorner:\catC
%D    B0 B1 >-> .plabel= b \llcorner{f'}\lrcorner:\catC
%D    
%D ))
%D enddiagram
%D
$$\pu
  \diag{??}
$$



\GenericWarning{Success:}{Success!!!}  % Used by `M-x cv'

\end{document}

%  __  __       _        
% |  \/  | __ _| | _____ 
% | |\/| |/ _` | |/ / _ \
% | |  | | (_| |   <  __/
% |_|  |_|\__,_|_|\_\___|
%                        
% <make>

* (eepitch-shell)
* (eepitch-kill)
* (eepitch-shell)
# (find-LATEXfile "2019planar-has-1.mk")
make -f 2019.mk STEM=2021ski veryclean
make -f 2019.mk STEM=2021ski pdf

% Local Variables:
% coding: utf-8-unix
% ee-tla: "ski"
% End: