Re: [sage-support] Re: intersection of ideals

2010-12-07 Thread andrew ewart
On Tue, Dec 7, 2010 at 4:58 PM, Simon King wrote: > On 7 Dez., 17:48, andrew ewart wrote: > > I thought I1=R=<1> > > As I said, nobody could guess that you believe that 1 is in R. > > > also the intersection should be in R, not just in P, so how is this > > achieved? > > Read my previous post, i

[sage-support] Re: intersection of ideals

2010-12-07 Thread Simon King
On 7 Dez., 17:48, andrew ewart wrote: > I thought I1=R=<1> As I said, nobody could guess that you believe that 1 is in R. > also the intersection should be in R, not just in P, so how is this > achieved? Read my previous post, it is answered there. -- To post to this group, send email to sage

Re: [sage-support] Re: intersection of ideals

2010-12-07 Thread andrew ewart
On Tue, Dec 7, 2010 at 4:29 PM, luisfe wrote: > On Dec 7, 5:03 pm, andrew ewart wrote: > > I have the following code > > > > P. = PolynomialRing(QQ,order='degrevlex') > > I = Ideal(x0^4-y0,x0^3*x1-y1,x0*x1^3-y2,x1^4-y3) > > print I > > R. = PolynomialRing(QQ,order='degrevlex') > > I1=Ideal(1) >

[sage-support] Re: intersection of ideals

2010-12-07 Thread Simon King
Hi, On 7 Dez., 17:03, andrew ewart wrote: > I have the following code > > P. = PolynomialRing(QQ,order='degrevlex') > I = Ideal(x0^4-y0,x0^3*x1-y1,x0*x1^3-y2,x1^4-y3) > print I > R. = PolynomialRing(QQ,order='degrevlex') > I1=Ideal(1) > J=I.intersection(I1) > print J > but gives error > File "/us

[sage-support] Re: intersection of ideals

2010-12-07 Thread luisfe
On Dec 7, 5:03 pm, andrew ewart wrote: > I have the following code > > P. = PolynomialRing(QQ,order='degrevlex') > I = Ideal(x0^4-y0,x0^3*x1-y1,x0*x1^3-y2,x1^4-y3) > print I > R. = PolynomialRing(QQ,order='degrevlex') > I1=Ideal(1) > J=I.intersection(I1) > print J > but gives error > File "/usr/lo