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TZID:Europe/Paris
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BEGIN:VEVENT
UID:3241@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20131025T140000
DTEND;TZID=Europe/Paris:20131025T150000
DTSTAMP:20131010T120000Z
URL:https://www.i2m.univ-amu.fr/events/a-cohen-ljll-upmc-at-frumam-st-char
les-new-thoughts-on-least-square-methods/
SUMMARY:A. Cohen (LJLL\\\, UPMC) at Frumam (St Charles): New thoughts on le
ast-square methods -
DESCRIPTION:New thoughts on least-square methods\n\nBy Albert Cohen\\\, Lab
oratoire Jacques Louis Lions\\\, Paris 6.\n\nLeast squares methods are of
common use when one needs to approximate a function based on its noiseless
or noisy observation at n scattered points by a simpler function chosen i
n an m dimensional space with m less than n. Depending on the context\\\,
these points may be randomly drawned according to some distribution\\\, or
deterministically selected by the user.\nIn this talk\\\, I shall analyze
the stability and approximation properties of least squares method. This
analysis involves the relative size of m with respect to n as well as the
spatial distribution of the samples. Applications will be given for high d
imensional sparse polynomial approximation to parametric-stochastic PDE's
and approximation of acoustic fields by plane waves.
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TZID:Europe/Paris
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DTSTART:20130331T030000
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