Russian reclusive maths genius Grigory Perelman did not appear in Paris on Tuesday 22nd June to collect his $1m prize for solving a problem that has puzzled scientists for more than a century.
Perelman, 43, was to be awarded the prize for proving the Poincaré conjecture, one of seven problems on the institute's Millennium Prize list.
Perelman, who lives in a small apartment in St Petersburg with his elderly mother, is unemployed and neighbours say he lives in poverty.
He has rejected job offers from several top US universities.
Explantion of the Poincaré Conjecture
