<
http://www.wired.com/2015/06/answer-150-year-old-math-conundrum-brings-mystery/>
"Yet for more than 150 years after Kirkman circulated his schoolgirl
problem, the most fundamental question in the field remained unanswered:
Do such puzzles usually have solutions? Kirkman’s puzzle is a prototype
for a more general problem: If you have n schoolgirls, can you create
groups of size k such that each smaller set of size t appears in just
one of the larger groups?"
Significant progress on an interesting area of maths.
Via Lauren Weinstein.
Share and enjoy,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://www.xanadu.com.au/ Chief Scientist, Xanadu
http://www.glasswings.com.au/ Partner, Glass Wings
http://www.sericyb.com.au/ Manager, Serious Cybernetics
