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| VALUE OF A VARIABLE OF POLINOMIAL FUNCION https://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=1817 |
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| Author: | vpachecu2 [ Mon Mar 29, 2010 6:02 am ] |
| Post subject: | VALUE OF A VARIABLE OF POLINOMIAL FUNCION |
HI sorry by the stupid question but i need compute the following i have a matrix A= x2*y1,y4, 3*x4,5; this matrix represent a jacob matrix of a given poly i have too values for get into this matrix to find a intmat understand?? ex |x 2x| ==> x= 3; ===> intmat = |3 6 | |3x 4x|.............................|9 12| how i can do it thanks, and sorry my horryble english i`m brazilian and dont speak very good |
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| Author: | seelisch [ Mon Mar 29, 2010 2:14 pm ] |
| Post subject: | Re: VALUE OF A VARIABLE OF POLINOMIAL FUNCION |
Hi, no problem. Just use the substitution command "subst"; like this: ring r = 0, (x,y,z), dp; matrix A[2][2]=x2*y,y4,3*x4,5; subst(A, x, 1, y, 0); // e.g., x = 1, y = 0 // yields this: _[1,1]=0 _[1,2]=0 _[2,1]=3 _[2,2]=5 Regards, Frank |
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| Author: | vpachecu2 [ Mon Mar 29, 2010 4:33 pm ] |
| Post subject: | Re: VALUE OF A VARIABLE OF POLINOMIAL FUNCION |
THANKS |
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