00743nam0-22002531i-450-990001257620403321000125762FED01000125762(Aleph)000125762FED0100012576220000920d1985----km-y0itay50------baengRearrangements and Convexity of Level Sets in PDEby KawohlBerlin [etc.]Springer-Verlag1985Lecture Notes in Mathematics1150Kawohl,Bernhard13606ITUNINARICAUNIMARCBK990001257620403321C-20-(11501491MA1MA1Rearrangements and convexity of level sets in PDE78472UNINAING01