2 papers
cs.DM2024
Restricted Permutations Enumerated by Inversions
Atli Fannar FranklÃn, Anders Claesson, Christian Bean +2
Permutations are usually enumerated by size, but new results can be found by enumerating them by inversions instead, in which case one must restrict one's attention to indecomposab…
math.CO2024
The enumeration of inversion sequences avoiding the patterns 201 and 210
Jay Pantone
We derive the algebraic generating function for inversion sequences avoiding the patterns and by describing a set of succession rules, converting them to a system of ge…