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math.AG2023
On the characterization of affine toric varieties by their automorphism group
Roberto Díaz, Alvaro Liendo, Andriy Regeta
In this paper we show that a normal affine toric variety X different from the algebraic torus is uniquely determined by its automorphism group in the category of affine irreducible…
math.CO2023
New results about the Inverse Eigenvalue Problem of a Graph
Roberto C. Díaz, Ana I. Julio
All graphs considered are simple and undirected. The Inverse Eigenvalue Problem of a Graph (IEP-G) aims to find all possible spectra for matrices whose entry, for $i\ne…
math.GM2023★ 2 cited
Averaging functions on triangular fuzzy numbers
Roberto Díaz, Aldryn Aparcana, Diego Soto +5
Admissible orders on fuzzy numbers are total orders which refine a basic and well-known partial order on fuzzy numbers. In this work, we define an admissible order on triangular fu…