BEGIN:VCALENDAR
PRODID:-//planitpurple.northwestern.edu//iCalendar Event//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
CLASS:PUBLIC
BEGIN:VTIMEZONE
TZID:America/Chicago
TZURL:http://tzurl.org/zoneinfo-outlook/America/Chicago
X-LIC-LOCATION:America/Chicago
BEGIN:DAYLIGHT
TZOFFSETFROM:-0600
TZOFFSETTO:-0500
TZNAME:CDT
DTSTART:19700308T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0500
TZOFFSETTO:-0600
TZNAME:CST
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
SEQUENCE:0
DTSTART;TZID=America/Chicago:20260421T150000
DTEND;TZID=America/Chicago:20260421T160000
DTSTAMP:20260421T044956Z
SUMMARY:The filtered circle
UID:641839@northwestern.edu
TZID:America/Chicago
DESCRIPTION:Speaker: Arpon Raksit (Northwestern)  Title: The filtered circle  Abstract: Let R be a commutative ring and A a smooth commutative R-algebra. The HKR filtration interpolates between the Hochschild homology and the algebraic differential forms of A/R. Hochschild homology carries its circle action\, while differential forms carry the de Rham differential. There is a structure on the HKR filtration\, called a "filtered circle action"\, that interpolates between these two structures; I will try to explain how this goes.
LOCATION:Lunt Hall\, 101\, 2033 Sheridan Road\, Evanston\, IL 60208
TRANSP:OPAQUE
URL:https://planitpurple.northwestern.edu/event/641839
CREATED:20260420T050000Z
STATUS:CONFIRMED
LAST-MODIFIED:20260420T173043Z
PRIORITY:0
BEGIN:VALARM
TRIGGER:-PT10M
ACTION:DISPLAY
DESCRIPTION:Reminder
END:VALARM
END:VEVENT
END:VCALENDAR