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D.4.4.5 isCI

Procedure from library cisimplicial.lib (see cisimplicial_lib).

Usage:
isCI(A); A is an integral matrix

Return:
1 if the simplicial toric ideal I(A) is a complete intersection and 0 otherwise. If printlevel > 0 and I(A) is a complete intersection it also shows a minimal set of generators of I(A)

Assume:
A is an m x n integral matrix with nonnegative entries and for every 1 <= i <= m, there exist a column in A whose i-th coordinate is not null and the rest are 0.

Example:
 

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