RE: Convert expression to polynomial
- To: mathgroup at smc.vnet.net
- Subject: [mg70427] RE: [mg70383] Convert expression to polynomial
- From: "David Park" <djmp at earthlink.net>
- Date: Mon, 16 Oct 2006 02:34:30 -0400 (EDT)
Diana,
Have you tried Together?
step1 = 1 + 1/(-t + t^2) +
1/((-t + t^2)^2*(-t + t^4)) +
1/((-t + t^2)^4*(-t + t^4)^2*(-t + t^8));
step2 = Together[step1]
PolynomialQuotient[Numerator[step2], Denominator[step2], t]
PolynomialRemainder[Numerator[step2], Denominator[step2], t]
David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/
From: Diana [mailto:diana.mecum at gmail.com]
To: mathgroup at smc.vnet.net
Math folks,
I am generating a list of partial sums which look like:
x = 1 + (-t + t^2)^(-1) + 1/((-t + t^2)^2*(-t + t^4)) + 1/((-t +
t^2)^4*(-t + t^4)^2*(-t + t^8))
I then try to calculate the PolynomialQuotient[Numerator[x],
Denominator[x], t], etc., and I get an error saying that x is not a
polynomial function.
I tried to find the command to put everything over a common
denominator, but was unable to find this. Can someone help?
Thanks,
Diana M.