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Question: Extract the variables from parametric polynomial ideal I

Question:Extract the variables from parametric polynomial ideal I

MDD 337
polynomial parameter name
June 04 2015
0

Let I  be a polynomial in K[A][X] s.t. A is a sequence of parameters (coefficients of f in F) and X is a sequence of variables. I want to extract the variables from ideal I.

For example if I=[(a-1)x*y^2-b+x, x-y+x^2-c] s.t. a,b,c are parameters and x,y are variables. I want {x,y} as the output of algorithm.
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