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Difference of ideals.
http://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=2578
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Author:  IliaToli [ Mon Mar 06, 2017 7:23 am ]
Post subject:  Difference of ideals.

Having ideal A and B, I want only those solutions of A that are not in B. How can I do that? Basically I am trying to exclude 0, 1, -1 as solutions. Is there a simple way to do that?

Author:  hannes [ Mon Mar 06, 2017 12:23 pm ]
Post subject:  Re: Difference of ideals.

see https://www.singular.uni-kl.de/Manual/4 ... ng_234.htm
(Difference of the "probable" radicals)

Author:  IliaToli [ Tue Mar 07, 2017 4:52 am ]
Post subject:  Re: Difference of ideals.

Ever since I found what I needed: Rabinovich trick. How to exclude unwanted solutions from a calculation. They say that the trick renders the calculation more cumbersome because it adds a variable. I don't think so, but have no personal experience with it.

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