possibleDenominators -- Possible denominators of deformations.

Usage:

possibleDenominators(I)

possibleDenominators(I,v)
Inputs:
- I, an ideal, monomial, reduced.
- v, a list, of variables of ring I.
Outputs:
- L, a list,

Description

Computes a list L of possible denominators of Laurent monomials representing FirstOrderDeformations of I. The list L is stratified into lists with ascending degree of the denominators. Each denominator is represented as a list of variables.

If the second argument v is given, one obtains only denominators contained (as a list) in v.

i1 : R=QQ[x_0..x_4];

i2 : I=ideal(x_0*x_1,x_1*x_2,x_2*x_3,x_3*x_4,x_4*x_0);

o2 : Ideal of R

i3 : possibleDenominators(I)

o3 = {{{x }, {x }, {x }, {x }, {x }}, {{x , x }, {x , x }, {x , x }, {x ,
         0     1     2     3     4       0   1     1   2     2   3     0 
     ------------------------------------------------------------------------
     x }, {x , x }}}
      4     3   4

o3 : List

i4 : possibleDenominators(I,{x_0,x_1,x_2});

Ways to use possibleDenominators:

possibleDenominators(Ideal)
possibleDenominators(Ideal,List)
possibleDenominators(List,List)

For the programmer

The object possibleDenominators is a method function.

The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/SRdeformations.m2:7536:0.

possibleDenominators -- Possible denominators of deformations.

Description

See also

Ways to use possibleDenominators:

For the programmer