2020-10-13 04:38:01 +0200 received badge ● Popular Question (source) 2017-11-24 02:41:38 +0200 asked a question vdim(std(I)) and vdim(I) returning different answers - Singular I thought std just put the ideal in a nicer format, so the answer should be independent. In this case I have 2 larger equation f_1, f_2 and I = jacob((f_1, f_2)). So it ends up being around 18 equations. I get vdim(std(I)) is the expected answer while vdim(I) the answer is a bit to big. Any help would be appreciated. 2016-11-28 09:28:50 +0200 commented answer Constant coefficient of Laurent Polynomials Thanks, this explains both how to fix and why it was not working which is what I wanted. I thought the fact that a6 was not a variable in my ring was implicit but evidently not. Thanks. 2016-11-28 09:27:09 +0200 received badge ● Supporter (source) 2016-11-28 09:27:01 +0200 received badge ● Scholar (source) 2016-11-27 12:16:54 +0200 received badge ● Student (source) 2016-11-27 11:41:14 +0200 asked a question Constant coefficient of Laurent Polynomials I am looking for the constant coefficient of a Laurent polynomial, the issue I am having is that sage is not simplifying the polynomial. An example: a = var(",".join( "a%i" %i for i in range(0, 6))) f = x*y + 1.00000000000000*a6*x + 1.00000000000000*a4*y + x*y^-1 + x^-1*y + 1.00000000000000*a3*y^-1 + 1.00000000000000*a1*x^-1 + x^-1*y^-1  Then I ask f/(x^1*y^0) # (The powers have to be in this way, just from the context of the work I am doing)  and it outputs: 1.00000000000000/x*x*y + 1.00000000000000*a6/x*x + 1.00000000000000*a4/x*y + 1.00000000000000/x*x*y^-1 + 1.00000000000000/x*x^-1*y + 1.00000000000000*a3/x*y^-1 + 1.00000000000000*a1/x*x^-1 + 1.00000000000000/x*x^-1*y^-1  Now when I ask for the constant coefficient of this LP it tells me its 0 when it is a6. How can I fix this. Thanks in advance