Abstract
This paper investigates a class of nonlinear elliptic equations on a fractal domain. We establish a strong Sobolev-type inequality which leads to the existence of multiple non-trivial solutions of Δu + c(x)u = f(x, u), with zero Dirichlet boundary conditions on the Sierpinski gasket. Our existence results do not require any growth conditions of f(x, t) in t, in contrast to the classical theory of elliptic equations on smooth domains.
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