problems.sty

\usepackage{amssymb, amsfonts, amsmath, amsthm}
\usepackage{enumerate}
\usepackage{bm}%makes better bold fornt in math
%\usepackage{color}
\usepackage{pifont,manfnt}
\usepackage{geometry}
\usepackage{graphicx}
\usepackage{epsfig,lpic,wrapfig}
\usepackage{ushort}
\usepackage[integrals]{wasysym} 
\usepackage{xfrac}
\usepackage{gensymb}%degree

\usepackage{epigraph}
\renewcommand{\epigraphsize}{\footnotesize}


\usepackage{epstopdf}
\epstopdfsetup{
    suffix=,%removes -eps-converted-to
    %program@epstopdf=epstopdf --gsopt=-dCompatibilityLevel=1.3,
}

%\pdfminorversion=3


%\pdfminorversion=7 %removes worning "found PDF version <1.7>, but at most version <1.5> allowed"
\hfuzz=1.002pt %ignoring overful hboxes smaller than 1.002pt

\usepackage{titling}
\newcommand{\subtitle}[1]{%
\posttitle{%
\par\end{center}
\begin{center}\huge #1\end{center}
\vskip0.5em}%
}

\usepackage[T1,T2A]{fontenc}
\usepackage[utf8]{inputenc}
\DeclareUnicodeCharacter{2010}{-}% support older LaTeX versions


\usepackage[
sorting=none,
bibencoding=auto,
backend=biber,
maxnames=10,
%babel=other,
autolang=other,
doi=false,
url=false,
style=numeric-comp,
isbn=false]{biblatex}
\usepackage{csquotes}
\AtEveryBibitem{\clearlist{language}}
\AtEveryBibitem{\clearlist{note}}
\renewbibmacro{in:}{}
\renewcommand*{\bibfont}{\scriptsize}
\addbibresource{library.bib}


\DeclareFieldFormat{postnote}{#1}% no postnote prefix in "normal" citation commands
\DeclareFieldFormat{multipostnote}{#1}% no postnote prefix in "multicite" commands
\DeclareFieldFormat{pages}{#1}% no prefix for the `pages` field in the bibliography


\usepackage[russian,
slovak,
german,
english]{babel}


%LIST STILES
\renewcommand{\@listI}{%
\leftmargin=25pt
\rightmargin=0pt
\labelsep=5pt
\labelwidth=20pt
\itemindent=0pt
\listparindent=0pt
\topsep=0pt plus 1pt
\partopsep=\topsep
\parsep=\topsep
\itemsep=\topsep}

%ITEMIZE-first order sign
\renewcommand{\labelitemi}{$\mathsurround=0pt \diamond$}
\renewcommand{\labelitemii}{$\mathsurround=0pt \circ$}

%ITEMIZE-first order sign
\renewcommand{\labelitemi}{$\mathsurround=0pt \diamond$}
\renewcommand{\labelitemii}{$\mathsurround=0pt \circ$}


\def\smallskip{\vskip\smallskipamount}
\def\medskip{\vskip\medskipamount}
\def\bigskip{\vskip\bigskipamount}


\def\parit#1{\medskip\noindent{\it #1}}
\def\parbf#1{\medskip\noindent{\bf #1}}

\def\noi{\noindent}%  

\def\CC{\mathbb{C}}%  
\def\DD{\mathbb{D}}%  
\def\HH{\mathbb{H}}% 
\def\PP{\mathbb{P}}%  
\def\NN{\mathbb{N}}%  
\def\RR{\mathbb{R}}% 
\def\SSS{\mathbb{S}}
\def\TT{\mathbb{T}}%
\def\T{\mathrm{T}}%
\def\UU{\mathrm{U}}%
\def\ZZ{\mathbb{Z}}% 
\def\QQ{\mathbb{Q}}% 
\def\II{\mathbb{I}}%

\def\RP{\RR\mathrm{P}}%
\def\CP{\CC\mathrm{P}}%
\def\Ad{\mathrm{Ad}}%
\def\Re{\mathrm{Re}}%
\def\Sc{\mathrm{Sc}}%
\def\SO{\mathrm{SO}}%
\def\SU{\mathrm{SU}}%
\def\SL{\mathrm{SL}}

\def\eps{\varepsilon}%  
\def\ge{\geqslant}%
\def\le{\leqslant}%
\def\phi{\varphi}%
\def\<{\langle}%
\def\>{\rangle}%
\def\~{\tilde}%
\def\emptyset{\varnothing}%
\def\aall{\buildrel \hbox{\tiny\it a.e.} \over{=\joinrel=}}

%operators
\def\CAT{\operatorname{\rm CAT}\nolimits}
\def\Const{\operatorname{\rm Const}\nolimits}
\def\area{\operatorname{\rm area}\nolimits}
\def\acts{\curvearrowright}
\def\bus{\operatorname{\rm bus}\nolimits}
\def\vol{\operatorname{\rm vol}\nolimits}
\def\diam{\operatorname{\rm diam}\nolimits}
\def\codim{\operatorname{\rm codim}\nolimits}
\def\dim{\operatorname{\rm dim}\nolimits}
\def\dist{\operatorname{\rm dist}\nolimits}
\def\div{\operatorname{\rm div}\nolimits}
\def\FillRad{\operatorname{\rm FillRad}}
\def\Hess{\operatorname{\rm hess}\nolimits}
\def\InjRad{\operatorname{\rm InjRad}\nolimits}
\def\Inn{\operatorname{\rm Inn}\nolimits}
\def\Int{\operatorname{\rm Int}\nolimits}
\def\id{\operatorname{\rm id}}
\def\length{\operatorname{\rm length}}
\def\pack{\operatorname{\rm pack}}
\def\Ric{\operatorname{\rm Ric}}
\def\Rm{\operatorname{\rm Rm}}
\def\Tor{\operatorname{\rm Tor}}
\newcommand*{\hinge}[3]{[#1\,{}^{#2}_{#3}]}
\renewcommand*{\lg}{%
\mathrel{\vcenter{\offinterlineskip
\hbox{$<$}\vskip-0.75ex\hbox{$>$}}}}

\newcommand{\asterism}{\smash{%
\raisebox{-.5ex}{%
\setlength{\tabcolsep}{.5pt}%
\begin{tabular}{@{}cc@{}}%
\multicolumn2c*\\[-1.7ex]*&*%
\end{tabular}}}}

\def\:{\colon}
\newcommand*{\set}[2]{\left\{\,\left.{#1}\vphantom{#2}\,\right|\,{#2}\,\right\}}

%problems type
\def\easy{$\lefteqn{{}^{\circ}}$}
\def\hard{$\lefteqn{{}^{\hskip.1mm\ast}}$}
\def\thm{$\lefteqn{{}^{{}^{+}}}$}
\def\many{$\lefteqn{{}^{\sharp}}$}

%problem
\newcounter{thm}
\renewcommand{\thethm}{\arabic{thm}}

\def\claim#1
{\par\medskip\noindent#1\refstepcounter{thm}
 \it\ }
%{\par\medskip\noindent\refstepcounter{thm}\hbox{\bf{\arabic{thm}#1.}{\it Problem.}}}
\def\endclaim{\par\medskip}
\newenvironment{pr}{\claim{\manimpossiblecube}}{\endclaim}


\newenvironment{cl}{\claim}{\endclaim}


\def\qeds{\qed\par\medskip}
\def\qedsin{\eqno\square}
\def\qedsf{\vskip-4.5mm\qeds\par\medskip}%END OF PROOF BY FORMULA

%comment
\def\comment#1{\par\smallskip
\hbox{%
\hspace{3em}\parbox{.91\textwidth}%
{{\small\it #1}}}
}

\DeclareCiteCommand{\ncite}%[\mkbibbrackets]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite:comp}}
  {}
  {\usebibmacro{cite:dump}%
   \usebibmacro{postnote}}

\newcommand*{\z}[1]{#1\nobreak\discretionary{}%
            {\hbox{$\mathsurround=0pt #1$}}{}}

\let\oldcdot\cdot
\def\cdot{{\hskip0.5pt\z\oldcdot\hskip0.5pt}}


\hyphenation{ 
Alex-an-drov 
Bu-ra-go 
geo-de-sic
geo-de-sics
half-space 
ho-mo-mor-phism 
ho-meo-mor-phisms
Kar-sten
Kirsz-braun
Lyt-chak 
Mat-ve-yev
dif-feo-mor-phisms
para-met-rized
pin-ched
qua-si-geo-de-sic 
qua-si-geo-de-sics
sub-ma-ni-fold 
Rie-mann-ian 
Vla-di-mir
}