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riccardo
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Post subject: truncate Posted: Mon Oct 08, 2007 3:27 pm |
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Given a map, is it possible to extract a map with only low order terms?
If I have: ring r = real,(x,y,z),dp; map f=r,x3+x2+x3y+4;
I want to get for instance x2+4
Thanks, Riccardo
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hannes
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Post subject: Re: truncate Posted: Tue Oct 16, 2007 8:11 pm |
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Joined: Wed May 25, 2005 4:16 pm Posts: 275
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Yes, jet provides this functionality: ring r = real,(x,y,z),dp; map f=r,x3+x2+x3y+4; jet(ideal(f),2); -> _[1]=x2+4.000e+00 and to a map again: map ff=r,jet(ideal(f),2);
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