BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Ingmar Saberi (University of Heidelberg) DTSTART:20210604T160000Z DTEND:20210604T170000Z DTSTAMP:20260423T021441Z UID:TQFT/42 DESCRIPTION:Title: Tw ists of supergravity theories via algebraic geometry\nby Ingmar Saberi (University of Heidelberg) as part of Topological Quantum Field Theory Cl ub (IST\, Lisbon)\n\n\nAbstract\nTwists of supersymmetric field theories h ave been the source of an enormous amount of new mathematics\, including ( just for example) Seiberg-Witten theory and mirror symmetry. It is reasona ble to expect that twists of supergravity theories will exhibit even riche r structure\, but they remain comparatively unexplored\, largely due to th eir intricacy. For example\, a holomorphically twisted version of the AdS/ CFT correspondence was proposed by Kevin Costello and Si Li\, motivated by constructions in topological string theory and the work of Bershadsky-Cec otti-Ooguri-Vafa\; Costello and Li conjectured a connection between their version of BCOV theory and the type IIB supergravity theory\, but did not verify this connection directly. I will show that the pure spinor superfie ld technique\, which has been known for some time in the physics literatur e\, can be used to elegantly and economically construct supersymmetric the ories\, as well as to swiftly compute their twists. In each case\, the res ulting structures are governed by the classical algebraic geometry of cert ain affine varieties. If time permits\, I'll discuss the examples of type IIB supergravity and eleven-dimensional supergravity in some detail.\n LOCATION:https://researchseminars.org/talk/TQFT/42/ END:VEVENT END:VCALENDAR