David Bickel schrieb:
In Scientific Word, I saved my file as "portable LaTeX." From Lyx, I imported the file as plain LaTeX. When I try to compile it, "\begin{definition}" causes this error: "LaTeX error: environment definition undefined."
Then the export from Scientific Word was incomplete. I guess that the amsmath and/or the amsthm package weren't loaded in the document preamble. To assure that this is not a LyX file, I need a _small_ example LyX file to be able to reproduce.
regards Uwe