\setcounter{tocdepth}{2} 
\frenchspacing
\usepackage[active]{srcltx} %Alt-X server-start
\usepackage[draft]{ifdraft}
\usepackage{leftidx}
\usepackage{amsthm}
\usepackage{caption}
\usepackage{epsfig}
\usepackage{alltt}
\usepackage{young}
\usepackage{makeidx}
\usepackage{newlfont}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{amsxtra}
\usepackage{mathrsfs}
\usepackage{stmaryrd}
\usepackage{amscd}
\usepackage{accents}
\usepackage{graphicx}
%\usepackage{stix}
%\usepackage{ulem}
%\usepackage{undertilde}
\usepackage[russian,ngerman]{babel}
\usepackage{verbatim}
\usepackage{ae}
\usepackage{wrapfig}
 \usepackage[all,cmtip,v2,2cell]{xy}
 \UseAllTwocells
%\input{xy}
%\xyoption{all}
\renewcommand{\floatpagefraction}{0.2}
\renewcommand{\figurename}{ }                           
\usepackage[OT2,T1]{fontenc}
\newcommand{\changefont}[3]{
\fontfamily{#1} \fontseries{#2} \fontshape{#3} \selectfont}
\renewcommand{\familydefault}{ptm}
\makeindex
\usepackage{xcolor}
\definecolor{amaranth}{rgb}{0.9, 0.17, 0.31}
\definecolor{aliceblue}{rgb}{0.94, 0.97, 1.0}
\definecolor{lavenderblush}{rgb}{1.0, 0.94, 0.96}
\definecolor{whitesmoke}{rgb}{0.96, 0.96, 0.96}
\definecolor{darkjunglegreen}{rgb}{0.1, 0.14, 0.13}
\definecolor{darksienna}{rgb}{0.24, 0.08, 0.08}
\definecolor{darkmidnightblue}{rgb}{0.0, 0.2, 0.4}
\definecolor{armygreen}{rgb}{0.29, 0.33, 0.13}
\definecolor{ral3001}{cmyk}{.18, 1, 1, .09}
\definecolor{ral7036}{cmyk}{.44, .37, .36, .02}
\definecolor{ral4006}{cmyk}{.14, .29, .65, 0}
\definecolor{ral4006}{cmyk}{.04, 1, 0, .15}
\definecolor{ral6017}{cmyk}{.87, .23, 1, .09}
\definecolor{ral6018}{cmyk}{.90, .1, 1, .01}
\definecolor{ral5017}{cmyk}{1, .76, .18, .04}
\definecolor{ral5019}{cmyk}{1, .43, 0, .18}
\input{newcommands}
\usepackage{showkeys}
\usepackage{xr-hyper}
\ifoptionfinal{\usepackage[pdftex,
        colorlinks,
        urlcolor=amaranth,   %darkmidnightblue \href{...}{...} external (URL)
        filecolor=darkjunglegreen,     % \href{...} local file
        linkcolor=armygreen,       % \ref{...} and \pageref{...}
        citecolor=darksienna,
        bookmarksopen=true,
 breaklinks=true]{hyperref}}{\usepackage[hypertex,hyperindex]{hyperref}}
\newcommand{\sose}[1]{\textcolor{orange}{#1}} 
\input{externaldocuments}
\ifoptionfinal{\newcommand{\nichtfinal}[1]{}}{\newcommand{\nichtfinal}[1]{\textcolor{orange}{#1}}}
\ifoptionfinal{\newcommand{\downmapsto}{\mathrel{\rotatebox[origin=c]{-90}{$\mapsto$}}}}{\newcommand{\downmapsto}{\da}}
\newcommand{\neu}[1]{\textcolor{amaranth}{#1}}
\input{newtheorems}