%0 Journal Article %A Díaz Díaz, Jesús Ildefonso %A Alvino, A. %A Lions, P.L. %A Trombetti, G. %T Elliptic-equations and steiner symmetrization %D 1992 %@ 0764-4442 %U https://hdl.handle.net/20.500.14352/57505 %X We present a new proof of comparison results via Steiner symmetrization for solutions of elliptic equations. This proof relies upon a "level sets" argument. %~