Opened 8 years ago

Closed 8 years ago

#701 closed bug (fixed)

delta invariant of normalization cannot be computed

Reported by: chini@… Owned by: somebody
Priority: minor Milestone: 4-1-0 and higher
Component: dontKnow Version: 4-0-1
Keywords: Cc:


I encountered a problem when computing the delta invariant of the normalization of R/I:

LIB "normal.lib"; ring R = 0,(X,Y,Z,W),ds; ideal I = X4-Y2+8X2Z-2YZ-Z2, 4X2Y+Y2-9X2Z+3YZ-XW, 6X2Y-3X2Z+2YZ-Z2-XW, X3Z+4/7XYZ-9/7XZ2+1/7X2W-2/7YW-2/7ZW, XYZ-5/3XZ2+1/9X2W-1/3YW-4/9ZW, Z3+13/21X3W+1/3XYW+XZW-5/21W2; I = radical(I); list norma = normal(I,"usering","wd");

It does not terminate - and if I stop it, Singular says: Interrupt at cmd:modulo in line:' delt = vdim(std(modulo(UD, c)));

The normalization without delta-invariant works. list norma = normal(I,"usering");

Change History (1)

comment:1 Changed 8 years ago by hannes

Resolution: fixed
Status: newclosed
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