RT Journal Article T1 Elliptic-equations and steiner symmetrization A1 Díaz Díaz, Jesús Ildefonso A1 Alvino, A. A1 Lions, P.L. A1 Trombetti, G. AB We present a new proof of comparison results via Steiner symmetrization for solutions of elliptic equations. This proof relies upon a "level sets" argument. PB Elsevier SN 0764-4442 YR 1992 FD 1992-06-18 LK https://hdl.handle.net/20.500.14352/57505 UL https://hdl.handle.net/20.500.14352/57505 LA eng DS Docta Complutense RD 14 dic 2025