This is a cool quote from the paper, "Parsing TEX into Mathematics":

We agree that there are good reasons for trying to come up with a

single universal grammar and semantics for mathematics notation, but

we are concerned that any efforts to find a fixed and complete

notation must founder on the shoals of ambiguity. Even granted some

oracle of disambiguation, it appears that total generality must

require fairly substantial extensibility and the ability to

incorporate context into interpretation. One simply cannot expect to

represent all past and especially all future mathematics with a fixed

set of notations. Therefore one must provide tools for extension that

are sufficiently "universal" for all further work.

-- http://www.cs.berkeley.edu/~fateman/papers/parsing_tex.pdf

Can you do painless TEX molecular modeling I wonder? I must google...

-gb

Epistemologist at-large

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