\typeout{Some  corrections for math.}
\typeout{rel. 03/07/22.   (vitar@mccme.ru)}
%
\typeout{Adding mathsymbols,}
%
\RequirePackage{amsfonts}
\RequirePackage{amssymb}
%\DeclareSymbolFontAlphabet{\mathbb}{AMSb}
%\def\Bbb{\@subst@obsolete\Bbb\mathbb}
%
\newcommand{\N}{\ensuremath{\mathbb{N}}}
\newcommand{\Z}{\ensuremath{\mathbb{Z}}}
\newcommand{\Q}{\ensuremath{\mathbb{Q}}}
\newcommand{\R}{\ensuremath{\mathbb{R}}}
\newcommand{\C}{\ensuremath{\mathbb{C}}}
\newcommand{\Real}{\ensuremath{\mathbb{R}}}
%
\typeout{changing \leq and \geq definition,}
\let\geq\geqslant
\let\leq\leqslant
%
\typeout{adding \bydef}
\newcommand{\bydef}{\stackrel{\mbox{\small def}}{=}}
%
\typeout{and \hm command}
\newcommand*{\hm}[1]{#1\nobreak\discretionary{}%
			{\hbox{$\mathsurround=0pt #1$}}{}}
%			
%
\endinput