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B.2.0.1 find_invo

Procedure from library involution.lib (see involution_lib).

Usage:
find_invo();

Purpose:
describes a variety of linear involutions on a basering

Return:
a ring together with a list of pairs L, where
L[i][1] = Groebner Basis of an i-th associated prime,
L[i][2] = multiplication matrix, reduced wrt L[i][1]

Note:
for convenience, the full ideal of relations 'idJ'
and the matrix with indeterminates 'matD' are exported in the output ring. "

Example:
 
LIB "involution.lib";
def a = CreateWeyl(1);
setring a;
def X = find_invo();
setring X;
L;
==> [1]:
==>    [1]:
==>       _[1]=@_1_1+@_2_2
==>       _[2]=@_1_2*@_2_1+@_2_2^2-1
==>    [2]:
==>       _[1]=-@_2_2
==>       _[2]=@_1_2
==>       _[3]=@_2_1
==>       _[4]=@_2_2


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