replacement of coefficients in a polynomial by absolute values?
Subject: replacement of coefficients in a polynomial by absolute values?
From: S. Newhouse
Date: Sun, 27 Apr 2008 12:30:00 -0400
Hello,
Given a polynomial p(x) = sum(a_j x^j) in which j = (j_1, . . . , j_n)
is a multi-index, is there a simple way to obtain the polynomial
q(x) = sum(abs(a_j) x^j) ?
Following some previous discussion, one could first extract the
coefficients, replace them by their absolute values, and then get q, but
I wondered if there are some special tools to make this easier.
TIA,
-sen