Macaulay2 » Documentation
Packages » IntegralClosure :: integralClosure(...,Verbosity=>...)
next | previous | forward | backward | up | index | toc

integralClosure(...,Verbosity=>...) -- display a certain amount of detail about the computation

Synopsis

Description

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 .00098548 sec #minors 3]
integral closure nvars 3 numgens 1 is S2 codim 1 codimJ 2

 [step 0: 
      radical (use minprimes) .00295836 seconds
      idlizer1:  .00884924 seconds
      idlizer2:  .0809013 seconds
      minpres:   .0108025 seconds
  time .118277 sec  #fractions 4]
 [step 1: 
      radical (use minprimes) .00196696 seconds
      idlizer1:  .0127894 seconds
      idlizer2:  .0265985 seconds
      minpres:   .0844333 seconds
  time .142535 sec  #fractions 4]
 [step 2: 
      radical (use minprimes) .00295492 seconds
      idlizer1:  .0147518 seconds
      idlizer2:  .0295412 seconds
      minpres:   .0137922 seconds
  time .147508 sec  #fractions 5]
 [step 3: 
      radical (use minprimes) .00295092 seconds
      idlizer1:  .014744 seconds
      idlizer2:  .0433518 seconds
      minpres:   .101252 seconds
  time .186902 sec  #fractions 5]
 [step 4: 
      radical (use minprimes) .00294184 seconds
      idlizer1:  .0157691 seconds
      idlizer2:  .0839258 seconds
      minpres:   .0860056 seconds
  time .211346 sec  #fractions 5]
 [step 5: 
      radical (use minprimes) .00393712 seconds
      idlizer1:   -- used 0.834112s (cpu); 0.57588s (thread); 0s (gc)
.0108024 seconds
  time .0226172 sec  #fractions 5]

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..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

Further information

Caveat

The exact information displayed may change.

Functions with optional argument named Verbosity :