\usepackage[czech]{babel}
\usepackage[latin2]{inputenc}
\usepackage {latexsym} \usepackage {amsmath} \usepackage {amsfonts}
\usepackage {amssymb} \usepackage {a4}
\usepackage {fullpage}

\newcount\castcnt
\def\myskip{\hskip1em}
\def\cast{\par\advance\castcnt1 %\ifnum\castcnt>97\myskip\fi
   \myskip (\char\the\castcnt)~}
\def\castusporna{\quad \advance\castcnt1 %\ifnum\castcnt>97\myskip\fi
   \myskip (\char\the\castcnt)~}
\newcount\priklad \priklad=0
\def\pr{\medskip\advance\priklad1\castcnt=96\relax\noindent{\bf\the\priklad.}~}

\def\oddel{ \medskip \hrule \medskip}
\def\Nadpis #1{\par\bigskip\centerline {\Large #1}\smallskip}
\def\nadpis #1{\par\bigskip\leftline {\bf #1}\smallskip}
\raggedright
\pagestyle{empty}

\let\Bbb\mathbb

\def\tg{\mathop{\rm tg}}
\def\cotg{\mathop{\rm cotg}}
\def\arctg{\mathop{\rm arctg}}
\def\d{\,{\rm d}}
\def\er{\mathbb{R}}
\def\en{\mathbb{N}}
\let\implies\Rightarrow
\let\Implies\Longrightarrow
\let\eps\varepsilon

\def\l{\displaystyle\lim_{n\to\infty}}
\let\lp\l
\def\limx#1{\lim\limits_{x\to #1}}
\def\sk#1{\sum_{k=#1}^\infty}
\def\floor#1{\lfloor#1\rfloor}
\def\ceil#1{\lceil#1\rceil}