Distorted Hankel integral operators

Details Distorted Hankel integral operators Distorted Hankel integral operators

2002-12-20

arxiv.org/abs/math/0212293v1

Mathematics

Functional Analysis

Scientific paper

For $\a,\b>0$ and for a locally integrable function (or, more generally, a distribution) $\f$ on $(0,\be)$, we study integral ooperators ${\frak G}^{\a,\b}_\f$ on $L^2(\R_+)$ defined by $\big({\frak G}^{\a,\b}_\f f\big)(x)=\int_{\R_+}\f\big(x^\a+y^\b\big)f(y)dy$. We describe the bounded and compact operators ${\frak G}^{\a,\b}_\f$ and operators ${\frak G}^{\a,\b}_\f$ of Schatten--von Neumann class $\bS_p$. We also study continuity properties of the averaging projection $\Q_{\a,\b}$ onto the operators of the form ${\frak G}^{\a,\b}_\f$. In particular, we show that if $\a\le\b$ and $\b>1$, then ${\frak G}^{\a,\b}_\f$ is bounded on $\bS_p$ if and only if $2\b(\b+1)^{-1}

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