Almost triangular Markov chains on $\mathbb{N}$

Luis Fredes, Jean-Francois Marckert

A transition matrix $[U_{i,j}{]}_{i,j\ge 0}$ on $\mathbb{N}$ is said to be almost upper triangular if $U_{i,j}\ge 0\Rightarrow j\ge i-1$, so that the increments of the correspondi…