\documentclass{article}

\usepackage{mkessler-hypersetup}
\usepackage{mkessler-categories}
\usepackage{mkessler-math}

\makeindex[name = categories]

\begin{document}
  \DeclareSimpleCategory[description = Vector spaces and linear maps]{mVect}
  \DeclareSimpleCategory[description = Rings and homomorphisms]{mRing}

  \DeclareCategory[
    formula = \Delta,
    ordered = Delta,
    description = simplicial sets
    ]{Simplicial}

  \DeclareSimpleCategory[description = monoide]{Mon}

  $\Ring\Ring\Mon\Simplicial$
  \newpage
  $\Ring\Vect$


  \MakeCategoryIndex
\end{document}