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Endpoint mapping properties of spherical maximal operators
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Endpoint mapping properties of spherical maximal operators
classification
math.CA
keywords
endpointmaximalboundscentereddefineddilationsfunctiongiven
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For a function $f\in L^p(\Bbb R^d)$, $d\ge 2$, let $A_t f(x)$ be the mean of $f$ over the sphere of radius $t$ centered at $x$. Given a set $E\subset (0,\infty)$ of dilations we prove endpoint bounds for the maximal operator $M_E$ defined by $M_E f(x)=\sup_{t\in E} |A_t f(x)|$.
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