Re: Advanced expression simplification

haberg@math.su.se (Hans Aberg)
12 Jul 2005 05:13:18 -0400

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From: haberg@math.su.se (Hans Aberg)
Newsgroups: comp.compilers
Date: 12 Jul 2005 05:13:18 -0400
Organization: Mathematics
References: 05-07-040
Keywords: optimize, analysis
Posted-Date: 12 Jul 2005 05:13:18 EDT

ichudov@algebra.com (Igor Chudov) wrote:


> Are there any good treatises on expression simplification.


I think you might check out Maple, because its algorithms at least used to
be open (ten years ago). Andre Heck wrote a book "Introduction to Maple".


In general though there is nothing such a general principle of
simplification. Expanding (x^n -1)/(x - 1) may sometimes be a good idea,
at other times not. If you represent polynomials as functions N -> set of
coefficient values, then expanding can take place also for large N. And so
on. There is a newsgroup sci.math.symbolic, which can perhaps provide more
info.


--
    Hans Aberg


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