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| lp to dp https://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=1662 |
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| Author: | ric [ Wed Feb 27, 2008 6:33 pm ] |
| Post subject: | lp to dp |
Hello I want to compute the Groebner Basis in x > z > y from an Ideal like: <z_i - f(x), y_i - g(x) > if I choose lp on z the computation is fast and I get a result in 5 minutes. But if I choose dp on z the computation takes a lot more time (> 3h). Unfortunately I need dp on z, so maybe there is a way to transform from lp to dp in short time? thanks |
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| Author: | hannes [ Mon Mar 03, 2008 12:57 pm ] |
| Post subject: | Re: lp to dp |
To convert a Groebner basis from one oredering to another you can use fglm (for zero dimensional ideals) or use the Hilbert function to speed up the computation: ring r1=....; ideal I=....; ideal J=groebner(I); intvec h=hilb(J,1); ring r2=.....; ideal I=fetch(r1,I); ideal J=std(I,h); Hans Schoenemann, Singular team |
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