E. Foster

collaborators

2 papers

cs.DM2026

Factorisability of Low Dimensional Non-Negative Integer Matrices

Paul C. Bell, Eva Foster, Daniel Reidenbach +1

We consider the problem of determining if a given two-dimensional nonnegative integer matrix $M$ is the product of two such matrices, excluding trivial units. A matrix $M$ with no…

cs.FL2026

Irreducibility of Endomorphisms of Finitely Generated Free Semigroups

Paul C. Bell, Eva Foster, Daniel Reidenbach

We introduce and investigate the irreducibility of endomorphisms of finitely generated free semigroups, i.e., we investigate when an endomorphism $φ : Σ^{+} \to Σ^{+}$ , where $Σ$ is any…