1948The Mathematical GazetteRequires access

A Problem on Circles

E. R. Reifenberg

Open publisher page 30 citations

Abstract

In connection with a general form of the covering principle and the relative differentiation of additive functions Mr. A. S. Besicovitch has proved that given a unit circle C with centre O , then any set of circles satisfying the conditions 1. Each circle of the set meets (or touches) C ; A . 2. Each circle of the set has radius not less than 1; 3. No circle contains O or the center of any other circle of the set, has less than 22 members.

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What this paper is about

In connection with a general form of the covering principle and the relative differentiation of additive functions Mr. A. S. Besicovitch has proved that given a unit circle C with centre O , then any set of circles satisfying the conditions 1. Each circle of the set meets (or touches) C ; A . 2. Each circle of the set has radius not less than 1; 3. No circle contains O or the center of any other circle of the set, has less than 22 members.

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Available abstract

In connection with a general form of the covering principle and the relative differentiation of additive functions Mr. A. S. Besicovitch has proved that given a unit circle C with centre O , then any set of circles satisfying the conditions 1. Each circle of the set meets (or touches) C ; A . 2. Each circle of the set has radius not less than 1; 3. No circle contains O or the center of any other circle of the set, has less than 22 members.

Key concepts: Unit circle, Mathematics, Great circle, Set (abstract data type), RADIUS, Connection (principal bundle), Center (category theory), Combinatorics

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