BEGIN:VCALENDAR PRODID:-//Dal News//Events Calendar//EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT DTSTAMP:20210126T113103Z DTSTART:20201029T173000Z SUMMARY:Arithmetic Sphere Packings DESCRIPTION:​Speaker: Alex Kontorovich (Rutgers Uni.)\n​Abstract: We describe a broad class of sphere packings generalizing the classical Apollonian circle packing\, and classify those which\, like the Apollonian packing\, support special arithmetic structures. No prior knowledge of these topics is assumed.​\n\nAdditional Information: This is part of the Mathematics Colloquium series.\n\nContact Information: LOCATION:Math & Stats Zoom Room URL: UID: END:VEVENT END:VCALENDAR