Hi all(adsbygoogle = window.adsbygoogle || []).push({});

I use Lyx v1.65 for creating LaTex.

Obviously it displays OK in Lyx. It also displays OK with an online editor I've tried

http://www.codecogs.com/latex/eqneditor.php

But invariably when I try to post LaTex to this forum it does not work. I've tried the sandbox which the reason for the error, but frankly speaking I don't have time to play around with LaTex code directly.

I wonder if anyone can suggest a good LaTex editor that is compatible with this forum.

FWIW, here's some LaTex created in Lyx which does not work here

\mathbf{\boldsymbol{\beta}^{\textrm{T}}A\boldsymbol{\beta}}&=\overset{n}{\underset{i=1}{\sum}}\overset{n}{\underset{j=1}{\sum}}\beta_{i}a_{ij}\beta_{j}

and

\frac{\partial(\mathbf{\mathbf{\beta}^{\textrm{T}}}\mathbf{A\boldsymbol{\beta}})}{\partial\beta_{k}}&=2\beta_{k}a_{kk}+2\overset{n}{\underset{i\neq k}{\sum}}a_{ki}\beta_{i}

Thanks

LR

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# LaTex advice/help

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