2 papers
math.GR2026
The Pascal matrix in the multivariate Riordan group
Helena Cobo
We generalize the concept of Pascal matrices to matrices associated with sets of points by considering multidimensional binomial coefficients as entries. We study their properties…
math.AG2019
Combinatorics and their evolution in resolution of embedded algebroid surfaces
Helena Cobo, M. J. Soto, José M. Tornero
The seminal concept of characteristic polygon of an embedded algebroid surface, first developed by Hironaka, seems well suited for combinatorially (perhaps even effectively) tracki…