%%
%% The LaTeX Companion, 3ed
%%
%% Example 4-1-39 on page I-285 in "thmtools --- Advanced theorem declarations".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.0pt}


  \usepackage{microtype}  % improve the line breaking in short measure


%StartShownPreambleCommands
\usepackage{amsthm,thmtools,cleveref}
\declaretheorem[title=Claim,
      Refname={Postulate,Postulates}]{thm}
%StopShownPreambleCommands

\begin{document}
\begin{thm}\label{thm1}    Many typographical
  problems are difficult to solve.          \end{thm}
\begin{thm}[Main]\label{thm2}
  But not when using the \LaTeX\ Companion. \end{thm}
``\Cref{thm1,thm2}'' or ``\cref{thm1} and \cref{thm2}''
or ``\cref{thm1,thm2}'' see?
\end{document}