Angus Leeming wrote: > (This command is provided by the amssymb package and so lyx does not > generate it if it knows that this package is being used.)
Aha. So beamer is also incompatible to amssymb. Anyway, your patch seems to work fine (though I have not compared the definitions of boldsymbol in LyX and beamer, i.e. if the output is appropriate). Regards, Jürgen.
