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FThresholds :: ftApproximation

ftApproximation -- gives a list of terms in the sequence whose limit defines an F-threshold

Synopsis

Description

This returns a list of terms of the sequence whose limit defines the F-threshold of I, or of f, with respect to J.

This list consists of νIJ(pd)/pd, or νfJ(pd)/pd, for d = 0,...,e.

i1 : R = ZZ/7[x,y];
i2 : I = ideal(x^5, y^5);

o2 : Ideal of R
i3 : J = ideal(x^2, y^3);

o3 : Ideal of R
i4 : ftApproximation(2,I,J)

         6  48
o4 = {0, -, --}
         7  49

o4 : List
i5 : f = x^3*y^2+x^5*y;
i6 : ftApproximation(2,f,J)

         4  32
o6 = {0, -, --}
         7  49

o6 : List

Ways to use ftApproximation :