A covering lemma for rectangles in ℝⁿ

Fefferman, Robert; Pipher, Jill

doi:10.1090/S0002-9939-05-07902-5

A covering lemma for rectangles in ${\mathbb {R}}^n$
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by Robert Fefferman and Jill Pipher PDF

Proc. Amer. Math. Soc. 133 (2005), 3235-3241 Request permission

Abstract:

We prove a covering lemma for rectangles in ${\mathbb {R}}^n$ which has connections to a problem of Zygmund and its solution in three dimensions by Cordoba.

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