F. Browder, ON A SHARPENED FORM OF THE LERAY-LIONS ELLIPTICITY CRITERION, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 324(9), 1997, pp. 999-1004
The well-known ellipticity criterion of Leray-Lions for solvability of
a nonlinear equation in divergence form is sharpened, eliminating any
coercivity hypothesis, by using a remark on the asymptotic strong mon
otonicity of strictly monotone mappings in finite dimensional spaces,
and extending the result to non-local mappings.