I forwarded it to our team list.
I suppose, that your homomorphism uses Singulars map internally.
That should be a good solution for more than two parallel
substitutions.
Michael
On 3 Sep., 08:18, William Stein wst...@gmail.com wrote:
Hi Martin (and Sage-devel),
I discovered that polynomial
On Thursday 03 September 2009, William Stein wrote:
Hi Martin (and Sage-devel),
I discovered that polynomial substitution is badly inconsistent between the
symbolic ring and multivariate polynomials:
sage: R.x,y = QQ[]
sage: f = x + 2*y
sage: f.subs(x=y,y=x)
3*y
sage: var('x,y')
sage:
