BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Jonas Schnitzer (University of Pavia\, Italy) DTSTART:20241127T130000Z DTEND:20241127T140000Z DTSTAMP:20260423T041818Z UID:LAGOON/97 DESCRIPTION:Title: Global homotopies for differential Hochschild cohomologies\nby Jonas S chnitzer (University of Pavia\, Italy) as part of Longitudinal Algebra and Geometry Open ONline Seminar (LAGOON)\n\n\nAbstract\nIt is well known tha t the Hochschild–Kostant–Rosenberg map from multivector fields to diff erential Hochschild cochains is a quasi-isomorphism. Nevertheless\, it is sometimes desirable to not only know the cohomology itself\, but also find reasonable formulas for primitives of exact cochains. In my talk I will e xplain how to construct a quasi-inverse of the Hochschild–Kostant–Rose nberg map and a homotopy to turn all the maps into a deformation retract. The difference to already existing attempts is that our construction is pe rformed globally and enjoys nice properties regarding symmetries. Moreove r\, the idea of this construction allows for generalizations in various di rections. This is a joint work with Marvin Dippell\, Chiara Esposito and S tefan Waldmann.\n\nhttps://uni-koeln.zoom.us/j/91875528987?pwd=US8wdjNrWjl 5dXNQSVRzREhoRE1PUT09\n\nMeeting ID: 918 7552 8987\nPassword: LAGOON\n LOCATION:https://researchseminars.org/talk/LAGOON/97/ END:VEVENT END:VCALENDAR