Local cone multipliers and Cauchy-Szego projections in bounded symmetric domains
We show that the cone multiplier satisfies local $L^p$-$L^q$ bounds only in the trivial range $1\leq q\leq 2\leq p\leq\infty$. To do so, we suitably adapt to this setting the proof of Fefferman for the ball multiplier. As a consequence we answer negatively a question by Békollé and Bonami (Colloq. Math. 68, 1995, 81-100), regarding the continuity from $L^p\to L^q$ of the Cauchy-Szegö projections associated with a class of bounded symmetric domains in $\mathbb{C}^n$ with rank $r\geq2$.
math.AP↗