Cutting Edge introduction: requiem for a probabilist

Requiem for a probabilist

Paul Malliavin, a French mathematician who died in 2010 aged 84, was working on an esoteric problem in pure probability in the 1970s – under what conditions the distribution of a random variable is smooth – when he discovered one of the revolutionary ideas of stochastic analysis. His breakthrough has been largely ignored by finance practitioners, but the first of this month’s technical papers – Being particular about calibration, by Société Générale’s Julien Guyon and Pierre Henry-Labordère –

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