2 papers
math.DG2019
Homogeneous surfaces admitting invariant connections
David Blázquez-Sanz, Carlos Alberto Marín Arango, Luis Fernando Jiménez Buitrago
We compute all the simply connected homogeneous and infinitesimally homogeneous surfaces admitting one or more invariant affine connections. We find exactly six non equivalent simp…
math.CO2016
Closed and asymptotic formulas for energy of some circulant graphs
David Blázquez-Sanz, Carlos Alberto Marín Arango
We consider circulant graphs G(r,N) where the vertices are the integers modulo N and the neighbours of 0 are {-r,...,-1,1,...,r}. The energy of G(r,N) is a trigonometric sum of N*r…