I think this is an appropriate companion to anything you would want write up in LaTex but can't remember what it's called: <a href="http://detexify.kirelabs.org/classify.html" rel="nofollow">http://detexify.kirelabs.org/classify.html</a>
Woo. I wrote the backend for this. See the comments on reddit:<p><a href="http://www.reddit.com/r/math/comments/bu580/springers_new_latex_search_for_finding/" rel="nofollow">http://www.reddit.com/r/math/comments/bu580/springers_new_la...</a>