Holes in donuts – the philosophical implications (part 2)

In 2001, professor Achille C. Varzi, of Columbia University, New York, very probably became the first philosopher to author a paper focusing specifically on the ramifications of holes in donuts (that’s ‘doughnuts’ in the UK), as we reported. But the paper wasn’t, in the literal sense, the last word on donut holes. In 2012 the subject […]

Hairy Ball Update 2012

The Hairy Ball Theorem  (HBT) was first postulated (and then proved) by Luitzen Egbertus Jan Brouwer in 1912. An informal statement of the theorem is that :               “One cannot comb the hair on a coconut”. Temptations to classify the theorem as trivial should be strongly resisted – as it’s still finding relevance in many current research […]