2 papers
math.CO2020
Fillings of skew shapes avoiding diagonal patterns
Vít Jelínek, Mark Karpilovskij
A skew shape is the difference of two top-left justified Ferrers shapes sharing the same top-left corner. We study integer fillings of skew shapes. As our first main result, we sho…
math.CO2017
Composability of Permutation Classes
Mark Karpilovskij
We define the operation of composing two hereditary classes of permutations using the standard composition of permutations as functions and we explore properties and structure of p…