Extracting polynomial coefficients?
- To: mathgroup@smc.vnet.net
- Subject: [mg11464] Extracting polynomial coefficients?
- From: Thomas Bell <tombell@leland.Stanford.EDU>
- Date: Thu, 12 Mar 1998 01:34:30 -0500
I have a very long polynomial that's a function of four variables, a, b, c, d. I would like Mathematica to (1) tell me what combinations of a, b, c, and d are in my polynomial, and (2) tell me what the coefficients are for each of the variable terms. For example, say I have constant terms r and q. My polynomial might look something like 4 a^2 b^3 c + r q d^5 + a d^3 + q c^2 a^2 + r^2 a d^3 I would like to have Mathematica output something like: a^2 b^3 => 4 d^5 => r q a d^3 => 1 + r^2 c^2 a^2 => q The polynomial is long enough that it would be very time-consuming to search through and identify all the combinations of (a,b,c,d). Any help appreciated. Thanks. -------------------------------------------------------------- Thomas (Tom) Bell Gravity Probe-B, H.E.P.L. tombell@stanford.edu Stanford University 136D Escondido Village Stanford, CA 94305-4085 Stanford, CA 94305 650/725-6378 (o) 650/497-4230 (h) 650/725-8312 (fax)