Computing gaussian & exponential measures of semi-algebraic sets
Résumé
We provide a numerical scheme to approximate as closely as desired
the Gaussian or exponential measure $\mu(\om)$ of (not necessarily compact) basic semi-algebraic sets
$\om\subset\R^n$. We obtain two monotone (non increasing and non decreasing) sequences of
upper and lower bounds $(\overline{\omega}_d)$, $(\underline{\omega}_d)$, $d\in\N$,
each converging to $\mu(\om)$ as $d\to\infty$. For each $d$, computing $\overline{\omega}_d$ or $\underline{\omega}_d$
reduces to solving a semidefinite program whose size increases with $d$.
Some preliminary (small dimension) computational experiments are encouraging and illustrate the
potential of the method. The method also works for any measure whose moments are known and which satisfies Carleman's condition.
Origine : Fichiers produits par l'(les) auteur(s)
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