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UID:20251031T063551EDT-87238I6eRD@132.216.98.100
DTSTAMP:20251031T103551Z
DESCRIPTION:Title: Conférence Nirenberg du CRM en analyse géométrique: Stoc
 hastic diffusive behavior at Kirkwood gaps\n\nAbstract: One of the well kn
 own indications of instability in the Solar system is the presence of Kirk
 wood gaps in the Asteroid belt. The gaps correspond to resonance between t
 heir periods and the period of Jupiter. The most famous ones are period ra
 tios 3:1\, 5:2\, 7:3. In the 1980s\, J. Wisdom and\, independently\, A. Ne
 ishtadt discovered one mechanism of creation for the 3:1 Kirkwood gap. We 
 propose another mechanism of instabilities\, based on an a priori chaotic 
 underlying dynamical structure. As an indication of chaos at the Kirkwood 
 gaps\, we show that the eccentricity of Asteroids behaves like a stochasti
 c diffusion process. Along with the famous KAM theory this shows a mixed b
 ehavior at the Kirkwood gaps: regular and stochastic. This is a joint work
  with M. Guardia\, P. Martin and P. Roldan.\n	\n	(Cette conférence s'adresse
  à un large auditoire. / This lecture is aimed at a general mathematical a
 udience.)\n
DTSTART:20190125T210000Z
DTEND:20190125T220000Z
LOCATION:room 6254\, CA\, Pav. André-Aisenstadt
SUMMARY:Vadim Kaloshin\, University of Maryland
URL:/mathstat/channels/event/vadim-kaloshin-university
 -maryland-293448
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