Mikhael N. Saushkin  wrote Friday, January 22,
2010, 14:05:18:
MNS> А какие математические шрифты будут
MNS> гармонично смотреться

Так как раз для Bitstream Charter есть
математическая поддержка.
http://ctan.tug.org/tex-archive/info/Free_Math_Font_Survey/survey.html
"Bitstream Charter [50] was donated by Bitstream
for use with X Windows. The Math Design fonts for
Bitstream Charter created by Paul Pichaureau [51]
are very complete, including Greek letters,
symbols from Computer Modern, and the AMS symbols.
Charis SIL [52] might be an alternate source for
Greek letters that match Bitstream Charter more
closely. Another possibility for a math font is to
use the Euler fonts with the charter and eulervm
packages."
\usepackage[charter]{mathdesign}