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 .000390256 sec #minors 3]
integral closure nvars 3 numgens 1 is S2 codim 1 codimJ 2
[step 0:
radical (use decompose) .00313395 seconds
idlizer1: .00546445 seconds
idlizer2: .010359 seconds
minpres: .00715464 seconds
time .0374509 sec #fractions 4]
[step 1:
radical (use decompose) .00340724 seconds
idlizer1: .00706183 seconds
idlizer2: .193824 seconds
minpres: .05921 seconds
time .275314 sec #fractions 4]
[step 2:
radical (use decompose) .00306063 seconds
idlizer1: .00968081 seconds
idlizer2: .0455142 seconds
minpres: .0174163 seconds
time .113361 sec #fractions 5]
[step 3:
radical (use decompose) .00344897 seconds
idlizer1: .0079401 seconds
idlizer2: .0426948 seconds
minpres: .0382336 seconds
time .127714 sec #fractions 5]
[step 4:
radical (use decompose) .0133471 seconds
idlizer1: .17514 seconds
idlizer2: .0737279 seconds
minpres: .0115489 seconds
time .330519 sec #fractions 5]
[step 5:
radical (use decompose) .00329362 seconds
idlizer1: .00875377 seconds
time .0180091 sec #fractions 5]
-- used 0.905369 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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