[FOM] Knot theory puzzle
T.Forster at dpmms.cam.ac.uk
Thu Sep 30 07:32:59 EDT 2004
Just been having morning chat with Raymond Lickorish (he's the one who
put the `l' in `Homfly') He mentioned a beguiling open problem in knot
``Is the crossing number of the sum of two
knots the sum of the crossing numbers?''
I'm not asking if anyone knows the answer to this - they don't! - but
what is the quantifier complexity??
URL: www.dpmms.cam.ac.uk/~tf tel: 01223-337981 and 020-7882-3659
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