V. Decicco et Ma. Vivaldi, HARNACK INEQUALITIES FOR FUCHSIAN TYPE WEIGHTED ELLIPTIC-EQUATIONS, Communications in partial differential equations, 21(9-10), 1996, pp. 1321-1347
Harnack type inequalities for nonnegative (weak) solutions of degenera
te elliptic equations, in divergence form, are established. The asympt
otic behavior of solutions of Fuchsian type weighted elliptic operator
s is also investigated.