https://www.cimat.mx/wp-content/uploads/2021/04/transparent.png00jpdelayehttps://www.cimat.mx/wp-content/uploads/2021/04/transparent.pngjpdelaye2021-03-23 19:22:462021-03-23 19:22:46The spectrum in R and R2 of nonlinear elliptic equations with positive parameters
