S. Furtado

activity

20172026

most citedLinear maps preserving the Lorentz spectrum: The

2 \times 2

case

2 citations · 2 across the 2 of their papers we have counts for

collaborators

3 papers

math.SP2026

Eigenspaces of Preserved Graph Laplacian Eigenvalues under Positive Edge-Weight Addition

Maribel Bueno, Susana Furtado, Javier Pérez

We study how the eigenspace associated with a fixed graph Laplacian eigenvalue changes under positive edge updates, allowing both new edges and increases in existing edge weights.…

math.RA2021★ 2 cited

Linear maps preserving the Lorentz spectrum: The $2 \times 2$ case

M. I. Bueno, Susana Furtado, Aelita Klausmeier +1

In this paper a complete description of the linear maps $ϕ : W_{n} \to W_{n}$ that preserve the Lorentz spectrum is given when $n = 2$ and $W_{n}$ is the space $M_{n}$ of $n\tim…

math.NA2017

Conditioning and backward error of block-symmetric block-tridiagonal linearizations of matrix polynomials

M. I. Bueno, F. M. Dopico, S. Furtado +1

For each square matrix polynomial $P (λ)$ of odd degree, a block-symmetric block-tridiagonal pencil $T_{P} (λ)$ was introduced by Antoniou and Vologiannidis in 2004, and a…

Eigenspaces of Preserved Graph Laplacian Eigenvalues under Positive Edge-Weight Addition

Linear maps preserving the Lorentz spectrum: The 2×2 case

Conditioning and backward error of block-symmetric block-tridiagonal linearizations of matrix polynomials

Linear maps preserving the Lorentz spectrum: The $2 \times 2$ case