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 .0005757 sec #minors 3]
integral closure nvars 3 numgens 1 is S2 codim 1 codimJ 2
[step 0:
radical (use minprimes) .00590857 seconds
idlizer1: .00869536 seconds
idlizer2: .0164875 seconds
minpres: .0112105 seconds
time .0589555 sec #fractions 4]
[step 1:
radical (use minprimes) .00707501 seconds
idlizer1: .0098179 seconds
idlizer2: .0473183 seconds
minpres: .0176098 seconds
time .100219 sec #fractions 4]
[step 2:
radical (use minprimes) .00714561 seconds
idlizer1: .0138885 seconds
idlizer2: .0331642 seconds
minpres: .0145111 seconds
time .112914 sec #fractions 5]
[step 3:
radical (use minprimes) .0084391 seconds
idlizer1: .0117252 seconds
idlizer2: .0515855 seconds
minpres: .0401361 seconds
time .211695 sec #fractions 5]
[step 4:
radical (use minprimes) .00882157 seconds
idlizer1: .0227309 seconds
idlizer2: .138617 seconds
minpres: .0191258 seconds
time .218396 sec #fractions 5]
[step 5:
radical (use minprimes) .00897076 seconds
idlizer1: .0149988 seconds
time .0337685 sec #fractions 5]
-- used 0.74076 seconds
o2 = R'
o2 : QuotientRing
|
i3 : trim ideal R'
3 2 2 2 4 4 2 2 2 3 2 3 2 3 2
o3 = ideal (w z - x , w x - w , w x - y z - z - z, w x - w z, w w - x y z - x z - x , w + w x y -
4,0 4,0 1,1 1,1 4,0 1,1 4,0 1,1 4,0 4,0
----------------------------------------------------------------------------------------------------------------------------
4 2 2 4 2 3 3 2 6 2 6 2
x*y z - x*y z - 2x*y z - 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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