Roberto C. D'iaz

collaborators

4 papers

math.AP2021

Exponential stability of the Euler-Bernoulli microbeam and thermal effect

Roberto Díaz, Octavio Vera, Nicolás Zumelzu

The main goal in this work is to prove the exponential decay of the semigroup associated with a thermoelastic system composed of an Euler-Bernoulli type equation that models the tr…

math.CO2021

Perturbing eigenvalues of nonnegative centrosymmetric matrices

Roberto C. Díaz, Ana I. Julio, Yankis R. Linares

An $n \times n$ matrix $C$ is said to be {\it centrosymmetric} if it satisfies the relation $J C J = C$ , where $J$ is the $n \times n$ counteridentity matrix. Centrosymmetric matrices ha…

math.CO2021

On the Randić energy of caterpillar graphs

Domingos M. Cardoso, Paula Carvalho, Roberto C. Díaz +1

A caterpillar graph $T (p_{1}, \dots, p_{r})$ of order $n = r + \sum_{i = 1}^{r} p_{i}$ , $r \geq 2$ , is a tree such that removing all its pendent vertices gives rise to a path of order $r$ . In t…

math.AG2021

Derivations on algebras of one-point compactification of affine semigroups

Roberto Díaz

For any affine semigroup $S$ the set $S \cup {\infty}$ has a natural structure of semigroup, additionally if $S$ is endowed with the discrete topology, the semigroup $S\cup\{\infty…