Let be a family of Partitions of and let denote the set of
Partitions in with Durfee Square of size . The Durfee polynomial of is then
defined as the polynomial
See also Durfee Square, Partition
Canfield, E. R.; Corteel, S.; and Savage, C. D. ``Durfee Polynomials.'' Electronic J. Combinatorics 5, No. 1, R32, 1-21, 1998.