D.5.2.56 partUnder

Usage:

partUnder(J); J list of integers (partition)

Return:

list of lists

Purpose:

computes the partitions under a given one

Note:

LIB "chern.lib";
// Partitions under the partition (0, 1, 1)
list I = 0, 1, 1;
print( partUnder(I) );