126 citations · 447 across the 20 of their papers we have counts for
4 papers · 1 filter
The topological classification of one-dimensional symmetric quantum walks
C. Cedzich, T. Geib, F. A. Grünbaum +4
We give a topological classification of quantum walks on an infinite 1D lattice, which obey one of the discrete symmetry groups of the tenfold way, have a gap around some eigenvalu…
The CMV bispectral problem
F. A. Grünbaum, L. Velázquez
A classical result due to Bochner classifies the orthogonal polynomials on the real line which are common eigenfunctions of a second order linear differential operator. We settle a…
Time and band limiting for matrix valued functions: an integral and a commuting differential operator
F. Alberto Grünbaum, Inés Pacharoni, Ignacio Nahuel Zurrián
The problem of recovering a signal of finite duration from a piece of its Fourier transform was solved at Bell Labs in the 's, by exploiting a "miracle": a certain naturally…
Tridiagonalization and the Heun equation
F. Alberto Grünbaum, Luc Vinet, Alexei Zhedanov
It is shown that the tridiagonalization of the hypergeometric operator yields the generic Heun operator . The algebra generated by the operators and is quadr…