2 papers
math.AP2021
The nonlinear Quadratic Interactions of the Schrödinger type on the half-line
Isnaldo Isaac Barbosa, Márcio Cavalcante
In this work we study the initial boundary value problem associated with the coupled Schrödinger equations {with quadratic nonlinearities, that appears in nonlinear optics}, on the…
math.DG2020
ON CURVES AND TUBES IN
J. Adonai P. Seixas, Isnaldo Isaac Barbosa
In this paper, we present a new explicit formula for the curvatures of a regular curve with an arbitrary parameter in the Euclidean space , , expressed only…