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TrevorM
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Post subject: Module resolutions Posted: Mon Jul 02, 2012 9:40 pm |
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Hi everyone, I am having a little trouble with the one set of commands I use Singular for, and I would love to see if there is a way to 'fix' it.
My problem is that I use Singular to calculate minimal resolutions of ideals of a specific form (or rather, the module R/I, where I is my ideal). The ideals I am using are generated by 3 binomial terms and 3 monomial terms. It is very important for my research that I know exactly how each generator is interacting, but Singular keeps feeling the need to change one of my monomial generators to an ideal-equivalent version. I can work around this, but it slows me down substantially to figure out all the conversions and then rewrite the resolution.
So my question is can I make Singular stick with only the generators I plug in? I included a piece of an example below.
ideal I=x4y4-z7,x4z3-y7,y3z4-x8,xy2z6,x3y4z5,x8y3z3; rs=minres(rs); print(rs[1]); y7-x4z3, x4y4-z7, x8-y3z4, xy2z6, x3y4z5, y6z7
It changes the monomial x8y3z3 into y6z7 which doesn't change anything ring-theoretically, but it makes my attempts at finding what I'm looking for quite difficult, so I would love to make it keep that 6th generator unchanged.
For the record, I am quite Singular-illiterate, but I am not so Ludditic that I won't use technology when it can compete things like resolutions easily for me!
Thanks in advance!
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hannes
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Post subject: Re: Module resolutions Posted: Tue Jul 03, 2012 9:49 am |
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Joined: Wed May 25, 2005 4:16 pm Posts: 275
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TrevorM
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Post subject: Re: Module resolutions Posted: Tue Jul 03, 2012 2:45 pm |
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Perfection! That is exactly what I was looking for. Thanks.
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