[net.puzzle] Wire problem - minimum radius of thin stands in a thick strand

jimmy@rlvd.UUCP (Jimmy Aitken) (06/21/85)

   An interesting problem was encountered by a friend recently. It involves
a number (n) of optical fibres of the same size contained within a larger
wire. The problem is as follows: Find the minimum radius of the larger wire
in terms of the radius of the n fibres.
   The problem is essentially that of arranging n circles of radius r inside
a larger circle of radius R, such that R is at a minimum. This problem is not
trivial. Ideally, a general equation should be derived for n circles, or 
alternatively a proof that no such equation is possible. As a test, find the
result for the case where n = 10.
   Any proofs, ideas, comments or suggestions would be appreciated.

             Ian Gunn. (...mcvax!ukc!rlvd!rlvg!ian)

-- 
Jimmy Aitken,	..!mcvax!ukc!rlvd!jimmy
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