LFAQ----less-frequently-asked-questions.rest

@@ -21,3 +21,12 @@ You might want to read `this thread <http://groups.google.com/group/mathjax-user
      <script>window.MathJax || document.write('<script type="text/x-mathjax-config">MathJax.Hub.Config({"HTML-CSS":{imageFont:null }});<\/script>
      <script src="<<PATH_TO_YOUR_LOCAL_MATHJAX>>MathJax.js?config=TeX-AMS_HTML-full"><\/ script>')</script> 
 
+Are there any fundamental differences between MathJax TeX input and TeX/LaTeX?
+------------------------------------------------------------------------------
+
+There aren't many, but `here's one discussion <https://groups.google.com/forum/#!msg/mathjax-users/aCj-qkCp3hY/nxd56AUC7coJ>`_ .
+
+Examples:
+
+* `\sqrt\frac{3}{4}` doesn't work. Enclosing the argument in curly braces works `\sqrt{\frac{3}{4}}`
+* `\hat \mathbf u` works in article-class, not in amsart and gives an error in MathJax -- `\hat{\mathbf u}` works in amsart and MathJax