TY - GEN AU - Kawohl,Bernhard TI - Rearrangements and convexity of level sets in PDE T2 - Lecture notes in mathematics SN - 0387156933 (New York : pbk.) U1 - 510 s515.3/53 PY - 1985/// CY - Berlin, New York PB - Springer-Verlag KW - Differential equations, Partial KW - Maximum principles (Mathematics) KW - Level set methods N1 - Cuprinde bibliografie si index ER -