BEGIN:VCALENDAR VERSION:2.0 PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4// BEGIN:VEVENT UID:20251220T220116EST-0182aL8T0U@132.216.98.100 DTSTAMP:20251221T030116Z DESCRIPTION:Title: Blue skies in the four body problem\n\nSuppose that a 2 freedom Hamiltonian system has a saddle focus equilibrium solution. Moreov er\, assume that the attached stable/unstable manifolds intersect transver sally in the energy level. In this case classic theorems of Henrard and De vaney describe the rich dynamics near the intersection. I'll recall the hi story of these homoclinic phenomena going back to the numerical work of Da rwin\, Moulton\, and Stromgren in the early Twentieth Century. Then I'll d iscuss some more recent work on the equilateral restricted four body probl em.\n DTSTART:20181022T200000Z DTEND:20181022T210000Z LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue Sherbrooke Ouest SUMMARY:Jason Mireles James\, Florida Atlantic University URL:/mathstat/channels/event/jason-mireles-james-flori da-atlantic-university-290815 END:VEVENT END:VCALENDAR