Shortening Polynomials
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg413] Shortening Polynomials
- From: corcoran (Stephen Corcoran) <corcoran%markov.stats at comlab.oxford.ac.uk>
- Date: Wed, 18 Jan 1995 12:41:12 +0000
Dear Mathgroupers,
Many thanks for all the replies I got for my previous requests. I
have a feeling this may be trivial, but I often want to shorten
polynomials, after using Expand. At the moment, I use the following
type of unwieldy expression:
t1 = a0 + a1 q + a2 q^2 ;
Expand[%^4] /. {q^3->0,q^4->0,q^5->0,q^6->0,q^7->0,q^8->0};
Is there a neater way to collect powers up to order m after
expanding a polynomial?
Thanks,
Stephen
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Stephen Corcoran, email: corcoran at stats.ox.ac.uk (internet)
Dept. of Statistics, corcoran at uk.ac.ox.stats (janet)
University of Oxford,
1, South Parks Road phone: (0865) 272879
OXFORD, OX1 3TG fax: (0865) 272595
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