An example of a space $L^{p(\cdot )}$ on which the Cauchy-Leray-Fantappiè operator for complex ellipsoid is not bounded

Abstract

We construct an example of a Lebesgue space with variable exponent on which Cauchy-Leray-Fantappiè operator associated with a complex ellipsoid is not bounded. This result extends previous counterexamples for the unit ball and demonstrates that the logarithmic continuity condition for the exponent function $p(\cdot )$ is sharp even for non-strictly convex domains. The proof is based on an explicit construction of test functions supported near points where the boundary fails to be strictly convex.