\documentclass[12pt, reqno]{amsart} \usepackage{amsmath, amsthm, amscd, amsfonts, amssymb, graphicx, color} \usepackage[bookmarksnumbered, plainpages]{hyperref} \textheight 22.5truecm \textwidth 14.5truecm \setlength{\oddsidemargin}{0.35in}\setlength{\evensidemargin}{0.35in} \setlength{\topmargin}{-.5cm} \newtheorem{theorem}{Theorem}[section] \newtheorem{lemma}[theorem]{Lemma} \newtheorem{proposition}[theorem]{Proposition} \newtheorem{corollary}[theorem]{Corollary} \theoremstyle{definition} \newtheorem{definition}[theorem]{Definition} \newtheorem{example}[theorem]{Example} \newtheorem{xca}[theorem]{Exercise} \newtheorem{problem}[theorem]{Problem} \theoremstyle{remark} \newtheorem{remark}[theorem]{Remark} \numberwithin{equation}{section} \begin{document} \setcounter{page}{76} \noindent\parbox{2.85cm}{\includegraphics*[keepaspectratio=true,scale=1.75]{BJMA.jpg}} \noindent\parbox{4.85in}{\hspace{0.1mm}\\[1.5cm]\noindent Banach J. Math. Anal. 2 (2008), no. 2, 76--84\\ $\frac{\rule{4.55in}{0.05in}}{{}}$\\ {\footnotesize \textcolor[rgb]{0.65,0.00,0.95}{\textsc{\textbf{\large{B}}anach \textbf{\large{J}}ournal of \textbf{\large{M}}athematical \textbf{\large{A}}nalysis}}\\ ISSN: 1735-8787 (electronic)\\ \textcolor[rgb]{0.00,0.00,0.84}{\textbf{http://www.math-analysis.org }}\\ $\frac{{}}{\rule{4.55in}{0.05in}}$}\\[.5in]} \title[Hardy inequality with one negative parameter]{The Hardy inequality with one negative parameter} \author[A. Kufner, K. Kuliev, Kulieva]{A. Kufner$^1$, K. Kuliev$^{2}$$^*$ and G. Kulieva$^3$} \address{$^{1}$ Mathematical Institute, Academy of Sciences of the Czech Republic, \v{Z}itna 25, 11567 Praha 1, Czech Republic} \email{\textcolor[rgb]{0.00,0.00,0.84}{kufner@math.cas.cz}} \address{$^{2}$ Department of Mathematics, University of West Bohemia, Univerzitn\'{\i} 22, 30614 Pilsen, Czech Republic } \email{\textcolor[rgb]{0.00,0.00,0.84}{komil@kma.zcu.cz}} \address{$^{3}$ Department of Mathematics, University of West Bohemia, Univerzitn\'{\i} 22, 30614 Pilsen, Czech Republic} \email{\textcolor[rgb]{0.00,0.00,0.84}{kulievag@mail.ru}} \dedicatory{Dedicated to Professor Josip E. Pe\v{c}ari\'{c}\\ \vspace{.5cm}{\rm Submitted by C. Park}} \subjclass[2000]{Primary 26D10, 26D15; Secondary 47B38.} \keywords{Inequalities, Hardy-type inequalities, weights, negative powers.} \date{Received: 19 February 2008; Accepted: 3 June 2008.\newline \indent $^{*}$ Corresponding author} \begin{abstract} In this paper, necessary and sufficient conditions for the validity of the Hardy inequality for the case $q<0,\, p>0 $ and for the case $q>0,\, p<0$ are derived. \end{abstract} \maketitle \vspace{1in} \end{document} .