Here's a quick example of a LaTeX file including a Cyrillic symbol.
\documentclass{article} \usepackage[OT2,T1]{fontenc} \DeclareSymbolFont{cyrletters}{OT2}{wncyr}{m}{n} \DeclareMathSymbol{\Sha}{\mathalpha}{cyrletters}{"58} \begin{document} This is the Tate-Shafarevich group: $\Sha_{E/K}$. Here it is as a subscript: $A_\Sha$. \end{document}
Last updated 22 February 2005