© 1999 by London Mathematical Society
© The London Mathematical Society
On a Problem Related to Sphere and Circle Packing
Nestou 6, Athens 14342, Greece themis{at}cco.caltech.edu, tmitsis{at}yahoo.com
Received 23 April 1998. Revision received 14 July 1998.
The paper proves that a set which contains spheres centered at all points of a set of Hausdorff dimension greater than 1 must have positive Lebesgue measure. It also proves the corresponding result for circles, provided that the set of centers has Hausdorff dimension greater than 3/2.