# igor

### History

Member for
15 years 9 months
 My articles: Liouville's Principle Buddy list actions: Member of: World WritableMy questions: exponential mapping
Forename:
Igor
Surname:
Khavkine
City:
Montreal
State:
QC
Country:
% this is the default PlanetMath preamble. as your knowledge % of TeX increases, you will probably want to edit this, but % it should be fine as is for beginners. % almost certainly you want these \usepackage{amssymb} \usepackage{amsmath} \usepackage{amsfonts} % used for TeXing text within eps files %\usepackage{psfrag} % need this for including graphics (\includegraphics) %\usepackage{graphicx} % for neatly defining theorems and propositions %\usepackage{amsthm} % making logically defined graphics %\usepackage{xypic} % there are many more packages, add them here as you need them % define commands here \def\sse{\subseteq} \def\bigtimes{\mathop{\mbox{\Huge $\times$}}} \def\impl{\Rightarrow}