https://www.cimat.mx/wp-content/uploads/2021/04/transparent.png00Pérez Garmendia José Luis Ángelhttps://www.cimat.mx/wp-content/uploads/2021/04/transparent.pngPérez Garmendia José Luis Ángel2021-03-23 20:34:052021-03-23 22:02:44Optimality of refraction strategies for spectrally negative Lévy processes