When the computation takes a considerable time, this function can be used to decide if it will ever finish, or to get a feel for what is happening during the computation.
i1 : R = QQ[x,y,z]/ideal(x^8-z^6-y^2*z^4-z^3); |
i2 : time R' = integralClosure(R, Verbosity => 2)
[jacobian time .000479309 sec #minors 3]
integral closure nvars 3 numgens 1 is S2 codim 1 codimJ 2
[step 0:
radical (use decompose) .00375656 seconds
idlizer1: .00716252 seconds
idlizer2: .0129474 seconds
minpres: .00937699 seconds
time .0474761 sec #fractions 4]
[step 1:
radical (use decompose) .00399166 seconds
idlizer1: .00861996 seconds
idlizer2: .0227483 seconds
minpres: .0146497 seconds
time .0652814 sec #fractions 4]
[step 2:
radical (use decompose) .00397533 seconds
idlizer1: .0113546 seconds
idlizer2: .025841 seconds
minpres: .0112201 seconds
time .0676473 sec #fractions 5]
[step 3:
radical (use decompose) .00402309 seconds
idlizer1: .00934965 seconds
idlizer2: .038493 seconds
minpres: .0301146 seconds
time .154113 sec #fractions 5]
[step 4:
radical (use decompose) .0040923 seconds
idlizer1: .0173543 seconds
idlizer2: .0783325 seconds
minpres: .013984 seconds
time .135783 sec #fractions 5]
[step 5:
radical (use decompose) .00388783 seconds
idlizer1: .0109733 seconds
time .0219794 sec #fractions 5]
-- used 0.496036 seconds
o2 = R'
o2 : QuotientRing
|
i3 : trim ideal R'
3 2 2 2 4 4
o3 = ideal (w z - x , w x - w , w x - y z - z - z, w x - w z,
4,0 4,0 1,1 1,1 4,0 1,1
------------------------------------------------------------------------
2 2 2 3 2 3 2 3 2 4 2 2 4 2
w w - x y z - x z - x , w + w x y - x*y z - x*y z - 2x*y z
4,0 1,1 4,0 4,0
------------------------------------------------------------------------
3 3 2 6 2 6 2
- x*z - x, w x - w + x y + x z )
4,0 1,1
o3 : Ideal of QQ[w , w , x, y, z]
4,0 1,1
|
i4 : icFractions R
3 2 2 4
x y z + z + z
o4 = {--, -------------, x, y, z}
z x
o4 : List
|
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