%\documentclass[12pt]{amsart}
\documentclass[12pt,a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage{amsmath,amsfonts,amssymb,amsthm,mathabx}
\bibliographystyle{utphys}
\usepackage{cite}
%\usepackage{times}
\usepackage{hyperref}
\usepackage{graphicx}
\usepackage{stmaryrd}
% \usepackage{here}
% \usepackage[margin=1in]{geometry}
% \setlength{\parindent}{0pt}
%\usepackage{showlabels}
%PACS 04.60.Cf, 04.20.Ha, 04.20.Jb, 11.15.Yc, 11.25.Tq, 11.30.-j
%\usepackage{mathpazo}
%\usepackage[mathscr]{eucal}