Hello, First I would like to congratulate the Lyx development team for this amazing program. I am a master's degree student in mathematics and Lyx is a hand on the wheel to create mathematical texts, specially for editing complicated formulas, which, in bare latex, are ugly and unreadable. For instance, I can't understand anything here:

\[\hat{f}_{n}=\int_{\left[0,1\right)}f\cdot\psi_{n}\, d\mu=\sqrt{2^{k}}\int_{\left[\frac{2r-2}{2^{k+1}},\frac{2r-1}{2^{k+1}}\right]}f\, d\lambda-\sqrt{2^{k}}\int_{\left[\frac{2r-1}{2^{k+1}},\frac{2r}{2^{k+1}}\right]}f\, d\lambda\textrm{,}\] The formula generated is very simple, yet it is not possible to see it in this code. I have been using Lyx for two years now, and currently I am using it to write my thesis. As a mathematician, I frequently use the package amsthm and, as far as I know, unfortunately, Lyx does not support this package. I need to insert latex code (\begin{theorem}, \end{theorem} and similar) everywhere. Not that this is too restrictive, but it would be nicer if those commands where better integrated with Lyx. Since Lyx already provides amsmath and amssymb packages whenever that option is chosen in Document configurations, I believe that it should also provide amsthm with them. Related to this subject, I found this bug report, but there isn't a description. http://www.lyx.org/trac/changeset/22460 Cheers, Gustavo.