BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:David Tennyson (Imperial College London) DTSTART:20200508T123000Z DTEND:20200508T133000Z DTSTAMP:20260423T021128Z UID:EGSS/3 DESCRIPTION:Title: Gen eralising G2 geometry: involutivity\, moment maps and moduli\nby David Tennyson (Imperial College London) as part of Exceptional geometry semina r series\n\n\nAbstract\nUnderstanding the geometry of flux backgrounds of string theory and M-theory is an important problem in phenomenology. Most attempts at this require studying backgrounds according to torsion classes \, or treating the flux perturbatively through moduli stabilisation. Howev er\, in both cases we either lose analytic tractability by losing the inte grable G-structures that characterise the fluxless backgrounds\, or we get only approximate results for small flux. In this talk we will show that g eneric flux backgrounds can be described by integrable SU(7) structures in exceptional generalised geometry. These structures have properties remini scent of conventional complex structures\, being described by an involutiv e subbundle of the generalised tangent bundle\, and a vanishing moment map . Using this structure we will be able to find the exact moduli of broad c lasses of flux backgrounds. This description of flux backgrounds also prov ides a new interpretation of G2 manifolds\, which may have interesting lin ks with geometric invariant theory and new exceptional Hitchin functionals .\n LOCATION:https://researchseminars.org/talk/EGSS/3/ END:VEVENT END:VCALENDAR