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Eval |
Syntax |
Eval(E:OBJECT,L:LIST):OBJECT |
Summary |
substitute numbers or polynomials for indeterminates |
Description |
This function substitutes the N-th element of L for the N-th indeterminate of the current ring for all N less than or equal to the minimum of the number of indeterminates of the current ring and the number of components of L. |
Example |
Use Q[xy]; Eval(x^2+y,[2, 3]); 7 ------------------------------- Eval(x^2+y,[2]); y + 4 ------------------------------- F:=x(x-1)(x-2)y(y-1)(y-2)/36; P:=[1/2, -2/3]; Eval(F, P); -5/162 ------------------------------- Eval([x+y,x-y],[2,1]); [3, 1] ------------------------------- Eval([x+y,x-y],[x^2,y^2]); [x^2 + y^2, x^2 - y^2] ------------------------------- Eval([x+y,x-y],[y]); [2y, 0] ------------------------------- |
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