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| memoize https://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=1392 |
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| Author: | Bahiano [ Thu Aug 11, 2005 5:32 pm ] |
| Post subject: | memoize |
Hi everybody. Does any one knows how to make singular remember the values that was calculated before. I mean, there exist command like the "memoize" from Macaulay2? the memoize command makes the procedure remember the results it had obtained before. Thanks for any help. email: bahiano@ufba.br Posted in old Singular Forum on: 2004-05-12 20:27:02+02 |
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| Author: | levandov [ Thu Aug 11, 2005 8:36 pm ] |
| Post subject: | Re: memoize |
Hello, Mr. Bahiano, Quote: > Hi everybody. > > Does any one knows how to make singular remember the values that was calculated before. I mean, there exist command like the "memoize" from Macaulay2? > Not exactly. We have a built-in function, "_", which returns the value of last displayed expression. (See the detailed explanation at http://www.singular.uni-kl.de/Manual/2-0-5/sing_35.htm). However, we do not recommend to use it while changing rings due to the reason that polynomial-based objects in Singular are ring-dependent. We can illustrate it with the following code Code: ring r=0,(x,y),dp; poly f=x2-y3; groebner(jacob(f)); ideal T=_; T; Quote: > the memoize command makes the procedure remember the results it had obtained before. > > Thanks for any help. > With best regards, |
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