Paul Barry
Published 2019-12-02Version 1
For a lower triangular matrix $(t_{n,k})$ we call the matrices with respective entries $(t_{2n-k,n})$ and $(t_{2n,n+k})$ the vertical and the horizontal halves. In this note, we discuss Riordan arrays whose halves are closely related to the Catalan matrices.
Riordan arrays, the $A$-matrix, and Somos $4$ sequences
On the Central Description of the Group of Riordan Arrays
Generalized Catalan recurrences, Riordan arrays, elliptic curves, and orthogonal polynomials
![QR code for arXiv:1912.01124 [math.CO]](http://oss.arxitics.com/images/favicon.svg)