Integer partitions | Number theory

Durfee square

In number theory, a Durfee square is an attribute of an integer partition. A partition of n has a Durfee square of size s if s is the largest number such that the partition contains at least s parts with values ≥ s. An equivalent, but more visual, definition is that the Durfee square is the largest square that is contained within a partition's Ferrers diagram. The side-length of the Durfee square is known as the rank of the partition. The Durfee symbol consists of the two partitions represented by the points to the right or below the Durfee square. (Wikipedia).

Durfee square
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Partition (number theory) | Arthur Cayley | James Joseph Sylvester | Number theory