\usepackage[cp1251]{inputenc} \usepackage[english,ukrainian]{babel} \usepackage{amsmath, amssymb, amsfonts, amsthm, cite} \usepackage{geometry} \renewcommand{\refname}{} \def\@biblabel#1{#1.} \geometry{papersize={14.8 cm, 21.0 cm},top=2cm,bottom=1.5cm,left=1.5cm,right=1.5cm} \newcommand{\AbsUkr}[1]{ \begin{center} \begin{minipage}{105mm} \footnotesize \it{ #1} \end{minipage} \end{center}} \newenvironment{Proof} {\par\noindent{\bf \indent Proof.}} {\hfill$\scriptstyle\blacksquare$} \newtheorem{theorem}{\indent Theorem} \newtheorem{lemma}{\indent Lemma} \newtheorem{proposition}{\indent Proposition} \newtheorem{corollary}{\indent Corollary} \theoremstyle{definition} % Roman body \newtheorem{definition}{\indent Definition} \newtheorem{example}{\indent Example} \newtheorem{remark}{\indent Remark} \renewcommand{\@evenhead}{\begin{minipage}{1.2\textwidth}{\vskip 0.2cm \bf The conference of young scientists «Pidstryhach readings – 2022 \\ May 25–27, 2022, Lviv }\end{minipage}} \renewcommand{\@oddhead}{\begin{minipage}{1.2\textwidth}{\vskip 0.2cm \bf The conference of young scientists «Pidstryhach readings – 2022»\\ May 25–27, 2022, Lviv }\end{minipage}} \renewcommand{\@evenfoot}{http://www.iapmm.lviv.ua/chyt2022} \renewcommand{\@oddfoot}{http://www.iapmm.lviv.ua/chyt2022}