4 papers
Enumerations and Bijections for Stanley Polyominoes
Jean-Luc Baril, Aubrey Blecher, José Luis ramírez
Stanley polyominoes are a subclass of parallelogram polyominoes in which each row begins strictly to the right of the beginning of the previous row and ends strictly to the right o…
Left to right maxima in Dyck Paths
Aubrey Blecher, Arnold Knopfmacher
In a Dyck path a peak which is (weakly) higher than all the preceding peaks is called a strict (weak) left to right maximum. We obtain explicit generating functions for both weak a…
The number of distinct adjacent pairs in geometrically distributed words
Margaret Archibald, Aubrey Blecher, Charlotte Brennan +3
A sequence of geometric random variables of length is a sequence of independent and identically distributed geometric random variables () where $\math…
Modelling x-ray tomography using integer compositions
Aubrey Blecher, Toufik Mansour
The x-ray process is modelled using integer compositions as a two dimensional analogue of the object being x-rayed, where the examining rays are modelled by diagonal lines with equ…