M. B. Branco

activity

20182024

collaborators

4 papers

math.AC2024

Numerical semigroups of coated odd elements

J. C. Rosales, M. B. Branco, M. A. Traesel

A numerical semigroup $S$ is coated with odd elements (Coe-semigroup), if ${x - 1, x + 1} \subseteq S$ for all odd element $x$ in $S$ . In this note, we will study this kind…

math.AC2021

The Frobenius problem for generalized repunit numerical semigroups

Manuel B. Branco, Isabel Colaço, Ignacio Ojeda

In this paper, we introduce and study the numerical semigroups generated by ${a_{1}, a_{2}, \dots} \subset N$ such that $a_{1}$ is the repunit number in base $b > 1$ of leng…

math.AC2021

Numerical semigroups with concentration two

José C. Rosales, M. B. Branco, Márcio A. Traesel

We define the concentration of a numerical semigroup $S$ as $C (S) = max {next_{S} (s) - s ∣ s \in S \ {0}}$ wherein $\text{next}_S(s)=\min\left\{…

math.AC2018

Almost symmetric numerical semigroups with given Frobenius number and type

M. B. Branco, I. Ojeda, J. C. Rosales

We give two algorithmic procedures to compute the whole set of almost symmetric numerical semigroups with fixed Frobenius number and type, and the whole set of almost symmetric num…