P. Gregori

collaborators

2 papers

math.ST2018

Schoenberg coefficients and curvature at the origin of continuous isotropic positive definite kernels on spheres

Ahmed Arafat, Pablo Gregori, Emilio Porcu

We consider the class $Ψ_{d}$ of continuous functions $ψ : [0, π] \to R$ , with $ψ (0) = 1$ such that the associated isotropic kernel $C (ξ, η) = ψ (θ (ξ, η))$ ---with $ξ,η\in \mat…

math.ST2015

ABC Shadow algorithm: a tool for statistical analysis of spatial patterns

R. S. Stoica, A. Philippe, P. Gregori +1

This paper presents an original ABC algorithm, "ABC Shadow", that can be applied to sample posterior densities that are continuously differentiable. The proposed method uses the id…