Re: Simplifying Ploynomials
- To: mathgroup at smc.vnet.net
- Subject: [mg5681] Re: Simplifying Ploynomials
- From: tharter at nswc.navy.mil (Terry Harter)
- Date: Tue, 7 Jan 1997 11:22:58 -0500
- Organization: Naval Surface Warfare Center, Dahlgren Division
- Sender: owner-wri-mathgroup at wolfram.com
Ted Ersk wrote: >Dear Math Group, > >The two polynomials "messy" and "clean" below are equivalentl. > >messy = c0 + a*c1 - b*c1 + a^2*c2 - 2*a*b*c2 + b^2*c2 > >clean = c0 + c1(a-b) + c2(a-b)^2 > >If I get a polynomial like the messy one, how can I get Mma >to convert is to the clean polynimial. > >I don't yet have Version 3..0. >Using Collect and Factor in version 2.2 does no good. >Maybe FullSimplify in version 3.0 will work. > >Still I would like to do this without using FullSimplify, >because it can take a very long time. > >Please Help > T.E. Look for a package called "Pattern Rearrange" that appearred in a past issue of "The Mathematica Jornal" (published quaterly). Or you can search MathSource as it may also be there. I don't have the Vol & Number of the specific issue that it appearred in (I think it was in late 94 or late 95), but if you can't find it, email me and I will make a point to look it up. "Pattern Rearrange" does quite nicely as I have used it on some long complicated algebraic expressions. Dr. Terry Harter NSWCDD, Code B35 Dahlgren, VA. 22448