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Singular maximal functions and Radon transforms near L¹

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arxiv math/0205156 v1 pith:F5O7O57A submitted 2002-05-14 math.CA

Singular maximal functions and Radon transforms near L¹

classification math.CA
keywords functionsmaximalsingularinequalityradontransformstypeweak
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We show that some singular maximal functions and singular Radon transforms satisfy a weak type $L\log\log L$ inequality. Examples include the maximal function and Hilbert transform associated to averages along a parabola. The weak type inequality yields pointwise convergence results for functions which are locally in $L\log\log L$.

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