2 papers
cs.FL2026
On Word Representations and Embeddings in Complex Matrices
Paul C. Bell, George Kenison, Reino Niskanen +2
Embeddings of word structures into matrix semigroups provide a natural bridge between combinatorics on words and linear algebra. However, low-dimensional matrix semigroups impose s…
cs.DM2025
On the Identity and Group Problems for Complex Heisenberg Matrices
Paul C. Bell, Reino Niskanen, Igor Potapov +1
We study the Identity Problem, the problem of determining if a finitely generated semigroup of matrices contains the identity matrix; see Problem 3 (Chapter 10.3) in ``Unsolved Pro…