'''Luis (A.) Medina''' is a Professor at the Mathematics Department of University of Puerto Rico.<ref>[http://sidim.uprh.edu/sidim2011/es/libroV1.pdf sidim.uprh.edu]</ref> Currently, Luis has a three year postdoctoral position at Rutgers University. | '''Luis (A.) Medina''' is a Professor at the Mathematics Department of University of Puerto Rico.<ref>[http://sidim.uprh.edu/sidim2011/es/libroV1.pdf sidim.uprh.edu]</ref> Currently, Luis has a three year postdoctoral position at Rutgers University. |