The trivial partition n = n also usually counts as a partition. This is useful if you want to be able to dualize partitions, and want n = 1 + 1 + ... + 1 to ha

The trivial partition n = n also usually counts as a partition. This is useful if you want to be able to dualize partitions, and want n = 1 + 1 + ... + 1 to have a dual partition.