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SUMMARY:Almost-universal integral quadratic forms: an effective solution o
 f a problem of Ramanujan
DTSTART:20191203T151500
DTEND:20191203T163500
DTSTAMP:20260507T174014Z
UID:b47be9c9be1ff8417896530bf81749b882de0534d58be6ae790e1117
CATEGORIES:Conferences - Seminars
DESCRIPTION:Jacek Bochnak\n \nDescription: ALMOST-UNIVERSAL INTEGRAL QUAD
 RATIC FORMS : AN EFFECTIVE SOLUTION OF A PROBLEM OF RAMANUJAN The object o
 f the talk is to present several results ( obtainend jointly with B.K.OH )
  that yield an effective methods for deciding whether a positive-defined i
 ntegral quadratic form is almost-universal \,that is \,whether it represen
 ts all large positive integers. In this way we obtain the final and defini
 tive solution to a problem first addressed and investigated by Ramanujan o
 ver 100 years ago.\nSpecial attention is given to 2 -anisotropic quaternar
 y almost-universal forms\, representing the main difficulty in the solutio
 n of the problem.
LOCATION:GR A3 30 https://plan.epfl.ch/?room==GR%20A3%2030
STATUS:CONFIRMED
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