Simplify and Abs
- To: mathgroup at smc.vnet.net
- Subject: [mg54602] Simplify and Abs
- From: Simon Anders <simon.anders at uibk.ac.at>
- Date: Thu, 24 Feb 2005 03:21:06 -0500 (EST)
- Organization: University of Innsbruck, Austria
- Sender: owner-wri-mathgroup at wolfram.com
Hi, can it really be that this is already beyond Mathematica? In := FullSimplify[Abs[p - 1], p < 1 && p > 1/2] Out := Abs[-1 + p] How do I make Matheamtica notice, that the assumptions constrain the argument of Abs[] to positive values? Any suggestions how to treat these kinds of problems? Specifically, I have a list of products of absolute values of simple polynomials in p and I know that p is in the interval [0,1]. I would like to know whether the polynomials have constant sign over the interval so that the Abs[] can be removed. Can this be done automatically? TIA Simon
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