finding equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg109351] finding equations*From*: "christopher arthur" <aarthur at tx.rr.com>*Date*: Fri, 23 Apr 2010 03:47:34 -0400 (EDT)

is there a program that helps to identify equations in documents? for example, a search engine that would search for "homogeneous linear equation" and return any document that contained something like that; i.e., a*b=0 3x+6y=0 this way we don't have to know which variable signs are chosen...