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math.DS2022
Characteristic Curves and the exponentiation in the Riordan Lie group: A connection through examples
Pedro J. Chocano, Ana Luzón, Manuel Alonso Morón +1
We point out how to use the classical characteristic method, that is used to solve quasilinear PDE's, to obtain the matrix exponential of some lower triangle infinite matrices. We…
math.GN2022
A combinatorial description of shape theory
Pedro J. Chocano, Manuel A. Morón, Francisco R. Ruiz del Portal
We give a combinatorial description of shape theory using finite topological -spaces (finite partially ordered sets). This description may lead to a sort of computational shap…