So I have this tikzpicture environment (dot2texi-generated):
\documentclass{beamer}
\usepackage[T2A,T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english,russian]{babel}
\usepackage{tikz}
\usetikzlibrary{arrows,shapes}
\begin{document}
\begin{frame}[fragile]
\begin{tikzpicture}[>=latex,line join=bevel,]
%%
\node (а) at (5bp,51bp) [draw,ellipse] {а};
\node (б) at (5bp,5bp) [draw,ellipse] {б};
\draw [->] (а) ..controls (5bp,39.554bp) and (5bp,29.067bp) .. (б);
%
\end{tikzpicture}
\end{frame}
\end{document}
with Cyrillic "а" and "б" nodes. pdfLaTeX, though, gives me the following error:
! Missing \endcsname inserted.
<to be read again>
\T2A\cyra
l.4 \node (а) at (5bp,51bp) [draw,ellipse] {а};
So the question is: how to use Cyrillic characters in tikzpicture nodes?
UPD:
I should've actually include contents of original dot2tex
environment. Andrey has given the basic idea of a possible solution: instead of
\begin{dot2tex}[]
digraph { "а" -> "б" };
\end{dot2tex}
one can use:
\begin{dot2tex}[]
digraph { a [label="а"]; b [label="б"]; a -> b }
\end{dot2tex}
Best Answer
You should distinguish between a node name and a node label. The first is how TeX references a node, and must be in ASCII. The second is how TeX presents the node, and may be anything TeX understands. See here: