References
- Alexandrov , A.D. 1962 . A characteristic property of the spheres . Ann, Mat. Pura App , 58 ( 1962 ) : 303 – 354 .
- Berestycki , H. and Nirenberg , L. 1988 . Monotonicity, symmetry and antisymmetry of solutions . J. Geom. Phys , 5 : 237 – 275 .
- Berestycki , H. and Nirenberg , L. 1990 . “ Some qualitative properties of solutions of semilinear ” . In in Analysis etc. (volume dedicated to J.Moser), , 115 – 164 . Academic Press : P.H.Rabinowitz .
- Berestycki , H. and Nirenberg , L. 1991 . On the method of moving planes and the sliding . Boletim da Soc. Brasileira de Mat. Nova Ser , 22 : 1 – 37 .
- Berestycki , H. and Pacella , F. 1989 . Symmetry properties for positive solutions of elliptic . J . Func. Ana1 , 87 : 177 – 211 .
- Dibenedetto , E. 1983 . C1>O local regularity of weak solutions of degenerate elliptic equations. . 7 : 827 – 850 .
- Franchi , B. and Laiuconelli , E. 1988 . “ Radial symmetry of the ground states for a class of quasilinear ” . In in"Non1inear diffusion equations and their equilibrium states", , New York : Springer-Verlag .
- Gidas , B. , Ni , W.M. and Nirenberg , L. 1979 . Symmetry and related properties via the maximum . Comm. Math. Phys , 68 : 209 – 243 .
- Gidas , B. , NI , W.M. and Nirekberg , L. 1981 . Symmetry of positive solutions of nonlinear elliptic . Adv. Math. Supp. Stud , 7 : 369 – 402 .
- Gilbarg , D. and Trudinger , N.S. “ Elliptic Partial Differential Equations of Second ” .
- LI , C. 1991 . Monotonicity and symmetry of solutions of fully nonlinear elliptic equations on unbounded . Comm. in PDE , 16 : 585 – 615 .
- Lieberman , G.M. 1988 . Boundary regularity for solutions of degenerate elliptic equations. . 12 : 1203 – 1219 .
- Serrin , J. 1971 . A symmetry problem in potential theory . Arch. Rational Mech. Anal , 43 : 304 – 318 .
- Tolksdorf , P. 1984 . Regularity for a more general class of quasilinear elliptic equations . J.Differentia1 Equations , 51 : 126 – 150 .
- Troy , W.C. 1981 . Symmetry properties in systems of semilinear elliptic equations . J.Differentia1 , 42 : 400 – 413 .