A Problem on Circles
E. R. Reifenberg
Abstract
E. R. Reifenberg
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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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