84 citations · 115 across the 3 of their papers we have counts for
3 papers
math.NA2021★ 1 cited
A Regularization Operator for the Source Approximation of a Transport Equation
Guillermo F. Umbricht, Diana Rubio, Claudio El Hasi
Source identification problems have multiple applications in engineering such as the identification of fissures in materials, determination of sources in electromagnetic fields or…
gr-qc1994★ 30 cited
Nontrivial Dynamics in the Early Stages of Inflation
E. Calzetta, C. El Hasi
Inflationary cosmologies, regarded as dynamical systems, have rather simple asymptotic behavior, insofar as the cosmic baldness principle holds. Nevertheless, in the early stages o…
gr-qc1992★ 84 cited
Chaotic Friedmann-Robertson-Walker Cosmology
E. Calzetta, C. El Hasi
We show that the dynamics of a spatially closed Friedmann - Robertson - Walker Universe conformally coupled to a real, free, massive scalar field, is chaotic, for large enough fiel…