Friday 5 August 2011

Togliatti Quintic


A classical question in algebraic geometry is how many cone-singularities a surface of a given degree can have. In 1940 Togliatti proved that for degree 5 surfaces 31 cone-singularities are possible. It took 40 years until Beauville could prove that this is indeed the maximal number. The movie shows a quintic with 31 cone-singularities.

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