The singular Cauchy operator is defined by $$S_\Gamma :f \to \int_\Gamma \frac{f(\xi)}{\xi-z} d\xi , z\in \Gamma.$$ Is this operator bounded in Morrey spaces and weighted Morrey spaces? i.e. is there a constant $c$ such for any $f$ belongs to Morrey space the following inequality is true $$|| S_\Gamma f|| < c ||f\|$$
