mjo-arrow.tex

   1 %
   2 % Things dealing with arrows in a category. Or functions, basically.
   3 %
   4
   5 % The identity operator/arrow on its argument.
   6 \newcommand*{\identity}[1]{ \operatorname{id}_{{#1}} }
   7
   8 % The composition of two arrows/functions. For example, the
   9 % composition of g with f is \compose{g}{f}\of{x} === g\of{f\of{x}}.
  10 \newcommand*{\compose}[2]{ {#1}\circ{#2} }
  11
  12 % The inverse of an arrow, function, or whatever.
  13 \newcommand*{\inverse}[1]{ #1^{-1} }