4 papers
Ordered set partition posets
Bruce E Sagan, Sheila Sundaram
A set partition is said to be ordered if the blocks of the partition are listed in a specific order. The ordered set partitions of , with a unique minimal element a…
K-promotion on m-packed labelings of posets
Jamie Kimble, Bruce E. Sagan, Avery St. Dizier
Schutzenberger's promotion operator, pro, is a fundamental map in dynamical algebraic combinatorics. At first, its action was mainly considered on standard Young tableaux. But pro…
Hyperbinary partitions and q-deformed rationals
Thomas McConville, James Propp, Bruce E. Sagan
A hyperbinary partition of the nonnegative integer n is a partition where every part is a power of 2 and every part appears at most twice. We give three applications of the length…
Generalized Euler numbers and ordered set partitions
Bruce E. Sagan
The Euler numbers have been widely studied. A signed version of the Euler numbers of even subscript are given by the coefficients of the exponential generating function 1/(1+x^2/2!…