9 citations · 17 across the 4 of their papers we have counts for
4 papers
Geometric and spectral analysis on weighted digraphs
Fernando Lledó, Ignacio Sevillano
In this article we give a geometrical description of the (in general non-selfadjoint) in/out Laplacian and adjacency matrix on digraphs with arb…
A geometric construction of isospectral magnetic graphs
John Stewart Fabila-Carrasco, Fernando Lledó, Olaf Post
We present a geometrical construction of families of finite isospectral graphs labelled by different partitions of a natural number of given length (the number of summands)…
Isospectral graphs via spectral bracketing
Fernando Lledó, John S. Fabila-Carrasco, Olaf Post
In this article, we develop a perturbative technique to construct families of non-isomorphic discrete graphs which are isospectral for the standard (also called normalised) Laplaci…
Representation of non-semibounded quadratic forms and orthogonal additivity
Alberto Ibort, José G. Llavona, Fernando Lledó +1
A representation theorem for non-semibounded Hermitian quadratic forms in terms of a (non-semibounded) self-adjoint operator is proven. The main assumptions are closability of the…