From: Christian Bauer <Christian.Bauer@uni-mainz.de>
Date: Mon, 15 Nov 2004 14:23:17 +0000 (+0000)
Subject: explain what we mean by "cofactor"
X-Git-Tag: release_1-4-0~205
X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=commitdiff_plain;h=a899ee390aaa5c2653d161388e457dbbe3cf2dd0

explain what we mean by "cofactor"
---

diff --git a/ginac/normal.cpp b/ginac/normal.cpp
index 47fec508..2bcba41a 100644
--- a/ginac/normal.cpp
+++ b/ginac/normal.cpp
@@ -1263,7 +1263,8 @@ static ex heur_gcd(const ex &a, const ex &b, ex *ca, ex *cb, sym_desc_vec::const
 
 
 /** Compute GCD (Greatest Common Divisor) of multivariate polynomials a(X)
- *  and b(X) in Z[X].
+ *  and b(X) in Z[X]. Optionally also compute the cofactors of a and b,
+ *  defined by a = ca * gcd(a, b) and b = cb * gcd(a, b).
  *
  *  @param a  first multivariate polynomial
  *  @param b  second multivariate polynomial