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 .000544581 sec #minors 3]
integral closure nvars 3 numgens 1 is S2 codim 1 codimJ 2
[step 0:
radical (use minprimes) .0202918 seconds
idlizer1: .00953266 seconds
idlizer2: .0170579 seconds
minpres: .0117856 seconds
time .076482 sec #fractions 4]
[step 1:
radical (use minprimes) .00294736 seconds
idlizer1: .0149539 seconds
idlizer2: .0303419 seconds
minpres: .0187245 seconds
time .0868407 sec #fractions 4]
[step 2:
radical (use minprimes) .00285467 seconds
idlizer1: .0160506 seconds
idlizer2: .0345611 seconds
minpres: .0155096 seconds
time .114097 sec #fractions 5]
[step 3:
radical (use minprimes) .00319053 seconds
idlizer1: .0175651 seconds
idlizer2: .0543572 seconds
minpres: .04314 seconds
time .149653 sec #fractions 5]
[step 4:
radical (use minprimes) .00311808 seconds
idlizer1: .083923 seconds
idlizer2: .106151 seconds
minpres: .0207723 seconds
time .245522 sec #fractions 5]
[step 5:
radical (use minprimes) .00373468 seconds
idlizer1: .0124206 seconds
time .028035 sec #fractions 5]
-- used 0.705461 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..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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