Johann Verwee

collaborators

2 papers

math.SP2026

Diagonal symmetrisation of tridiagonal Toeplitz matrices

Johann Verwee

We develop a self-contained framework for real tridiagonal Toeplitz matrices $A_{n} (a, b, c)$ (diagonal $b$ , subdiagonal $a$ , superdiagonal $c$ ) in the symmetrisable regime $a c > 0$ . A d…

math.SP2026

A spectral product formula for repunits via a tridiagonal Toeplitz similarity

Johann Verwee

For $b > 0$ and $n ⩾ 1$ , we consider the $n \times n$ tridiagonal matrix $V_{n} (b)$ with diagonal entries $b + 1$ , superdiagonal entries $1$ , and subdiagonal entries $b$ . A diagona…