01306nam2-2200409li-450 99000018392020331620170913145326.00-521-46195-20018392USA010018392(ALEPH)000018392USA0100183922001999012000-------y0itay0103----baengGB<<An>> introduction to maximum principles and symmetry in elliptic problemsL. E. FraenkelCambridgeUniversity Presscopyr. 2000X, 340 p.ill.23 cmCambridge tracts in mathematics12800100227302001Cambridge tracts in mathematics128Operatori ellitticiSimmetria515.7242Fraenkel,L. E.65755ITsalbcISBD990000183920203316510 TM 12824676/CBS51000112293BKSCI1999011720001110USA01171320020403USA011626DIGIUSEPPE9020021125USA011641PATRY9020040406USA011613RSIAV69020091111USA011449Introduction to maximum principles and symmetry in elliptic problems378165UNISA