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arXiv · 2404.03294

On the solutions of linear systems over additively idempotent semirings

Álvaro Otero Sánchez·Daniel Camazón·Juan Antonio López Ramos
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Abstract

The aim of this article is to solve the system $XA=Y$ where $A=(a_{ij})\in M_{m\times n}(S)$, $Y\in S^{m}$ and $X$ is an unknown vector of size $n$, being $S$ an additively idempotent semiring. If the system has solutions then we completely characterize its maximal one, and in the particular case where $S$ is a generalized tropical semiring a complete characterization of its solutions is provided as well as an explicit bound of the computational cost associated to its computation. Finally, when $S$ is finite, we give a cryptographic application by presenting an attack to the key exchange protocol proposed by Maze, Monico and Rosenthal.

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Álvaro Otero Sánchez, Daniel Camazón, Juan Antonio López Ramos. 2024-04-04. On the solutions of linear systems over additively idempotent semirings. https://arxiv.org/abs/2404.03294

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