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FThresholds :: fptApproximation

fptApproximation -- gives a list of terms in the sequence whose limit defines the F-pure threshold

Synopsis

Description

This returns a list consisting of terms whose limit defines the F-pure threshold of I, or of f.

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

i1 : R = ZZ/13[x,y];
i2 : I = ideal(x^2, y);

o2 : Ideal of R
i3 : fptApproximation(2,I)

         18  252
o3 = {0, --, ---}
         13  169

o3 : List
i4 : f = x^5 + x^2*y^3;
i5 : fptApproximation(2,f)

          4   64
o5 = {0, --, ---}
         13  169

o5 : List

See also

Ways to use fptApproximation :