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 .000436948 sec #minors 3]
integral closure nvars 3 numgens 1 is S2 codim 1 codimJ 2
[step 0:
radical (use decompose) .00346242 seconds
idlizer1: .00629765 seconds
idlizer2: .0119508 seconds
minpres: .00819865 seconds
time .0427945 sec #fractions 4]
[step 1:
radical (use decompose) .00366469 seconds
idlizer1: .00731399 seconds
idlizer2: .0227645 seconds
minpres: .0138051 seconds
time .0620834 sec #fractions 4]
[step 2:
radical (use decompose) .00367612 seconds
idlizer1: .0281457 seconds
idlizer2: .0259174 seconds
minpres: .0109946 seconds
time .0838858 sec #fractions 5]
[step 3:
radical (use decompose) .00407668 seconds
idlizer1: .00946361 seconds
idlizer2: .0451628 seconds
minpres: .03474 seconds
time .117477 sec #fractions 5]
[step 4:
radical (use decompose) .00400474 seconds
idlizer1: .0174364 seconds
idlizer2: .0873753 seconds
minpres: .0144557 seconds
time .166017 sec #fractions 5]
[step 5:
radical (use decompose) .00392075 seconds
idlizer1: .0107782 seconds
time .0219486 sec #fractions 5]
-- used 0.497759 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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