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Puntos fijos hiperbólicos de un difeomorfismo local del planoPuntos fijos hiperbólicos de un difeomorfismo local del plano
(2009-02-18)
An extension of J. Palis’ lambda-lemma is obtained for one case of non-transversal intersection of the stable and unstable manifolds of an hyperbolic fixed point of a C2 local diffeomorphism of R2.
Deformaciones isométricas infinitesimales de una clase de superficies pegadasDeformaciones isométricas infinitesimales de una clase de superficies pegadas
(2009-02-20)
In this work the sufficient condition of rigidity of a stuck 4-dimensional surface inthe Euclidean 6-dimensional space is demonstrated. This surface represents in himself,the product of Riemann of two surfaces, each one ...
Faà di Bruno Hopf algebras
(2022-11)
This is a short review on the Faà di Bruno formulas, implementing composition of real-analytic functions, and a Hopf algebra associated to such formulas. This structure allows, among several other things, a short proof of ...