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- W4210546324 abstract "Arithmetical structures on graphs were first introduced in [11]. Later in [3] they were further studied in the setting of square non-negative integer matrices. In both cases, necessary and sufficient conditions for the finiteness of the set of arithmetical structures were given. More precisely, an arithmetical structure on a non-negative integer matrix L with zero diagonal is a pair (d,r)∈N+n×N+n such that(Diag(d)−L)rt=0t and gcd(r1,…,rn)=1. Thus, arithmetical structures on L are solutions of the polynomial Diophantine equationfL(X):=det(Diag(X)−L)=0. Therefore, it is of interest to ask for an algorithm that compute them. We present an algorithm that computes arithmetical structures on a square integer non-negative matrix L with zero diagonal. In order to do this we introduce a new class of Z-matrices, which we call quasi M-matrices." @default.
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- W4210546324 date "2022-05-01" @default.
- W4210546324 modified "2023-09-24" @default.
- W4210546324 title "Algorithmic aspects of arithmetical structures" @default.
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- W4210546324 doi "https://doi.org/10.1016/j.laa.2022.01.020" @default.
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