2 citations · 3 across the 2 of their papers we have counts for
3 papers
The numerical range of some periodic tridiagonal operators is the convex hull of the numerical ranges of two finite matrices
Benjamín A. Itzá-Ortiz, Rubén A. Martínez-Avendaño, Hiroshi Nakazato
In this paper we prove a conjecture stated by the first two authors establishing the closure of the numerical range of a certain class of -periodic tridiagonal operators as th…
The numerical range of a periodic tridiagonal operator reduces to the numerical range of a finite matrix
Benjamín A. Itzá-Ortiz, Rubén A. Martínez-Avendaño, Hiroshi Nakazato
In this paper we show that the closure of the numerical range of an -periodic tridiagonal operator is equal to the numerical range of a complex matrix.
Norms, Kernels and Eigenvalues of some Infinite Graphs
Aahan Agrawal, Astrid Berge, Seth Colbert-Pollack +2
In these paper we study the adjacency matrix of some infinite graphs, which we call the shift operator on the space of the graph. In particular, we establish norm estimates,…