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| help on the function reduce https://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=2484 |
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| Author: | wolf [ Mon Jan 12, 2015 9:28 pm ] |
| Post subject: | help on the function reduce |
Hello everyone, I meet a problem when I use the Singular function reduce. I first compute a standard basis as follows, and the result is correct. > ring B=0,(x,y,u),(a(1,1,-1),dp); > poly f=-2x4-2x2y2+5x2y+y3-2y2; > ideal i=jacob(f); > ideal k=i,u-f; > ideal G=std(k); > G; G[1]=18xy2-27xy+64xu G[2]=45x2+9y2-32x2u-36y-27u G[3]=u G[4]=4y3+25x2-y2-20y-16u But when I type reduce(x2,G); Singular seems to die. Is there anyone who knows why this happens? Thank you in advance! |
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| Author: | hannes [ Tue Jan 13, 2015 5:00 pm ] |
| Post subject: | Re: help on the function reduce |
Thanks for the report: here ecart was computed in a wrong way leading to a "never ending" reduce function. It is now fixed in the sources. For the time being you may use reduce(x2,G,1); |
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| Author: | wolf [ Tue Jan 13, 2015 7:02 pm ] |
| Post subject: | Re: help on the function reduce |
Ok, thanks! when this problem is fixed, would you please let me know that? Thank you! |
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