Hi all Now I forgot to mention it before but if anyone is interested: later today at 4pm I will give a talk about work I did together with Riccardo. See info below. Feel free to join of course! Sibylle ---------- Forwarded message --------- From: Emanuel Malek <emanuel.malek@aei.mpg.de<mailto:emanuel.malek@aei.mpg.de>> Date: Fri, 16 Apr 2021 at 08:20 Subject: Exceptional Geometry Seminar series today: Sybille Driezen - Supergravity solution-generating techniques and canonical transformations of σ-models from O(D,D) To: Cc: Franz Ciceri <franz.ciceri@aei.mpg.de<mailto:franz.ciceri@aei.mpg.de>>, Gianluca Inverso <g.inverso@qmul.ac.uk<mailto:g.inverso@qmul.ac.uk>>, Thompson D.C. <d.c.thompson@swansea.ac.uk<mailto:d.c.thompson@swansea.ac.uk>>, Emanuel Malek <emanuel.malek@physik.hu-berlin.de<mailto:emanuel.malek@physik.hu-berlin.de>>, Charles Strickland-Constable <c.strickland-constable@herts.ac.uk<mailto:c.strickland-constable@herts.ac.uk>> Dear colleagues and friends, Please forward to anyone you think might be interested, including students and postdocs. This is a reminder for today's talk in our seminar series. Friday 16th April at 16:00 CEST (GMT + 1 or local time in Germany & France); 15:00 UK local time; 10:00am EDT Speaker: Sybille Driezen (Santiago de Compostela University) Title: Supergravity solution-generating techniques and canonical transformations of σ-models from O(D,D) Abstract: In this talk I will discuss solution-generating techniques of supergravity and canonical transformations of σ-models using the framework of the flux formulation of Double Field Theory (DFT). Given that the DFT equations of motion as well as the Poisson brackets of two-dimensional sigma models can be written in terms of the so-called generalised fluxes, I will discuss within certain assumptions a classification of transformations which leave these fluxes invariant but transform the background non-trivially. We will assume a generalised Scherk-Schwarz ansatz for the generalised vielbein, such that it takes a twisted form, and that the twist gives rise to constant generalised fluxes on the strong constraint. Furthermore the twist is required to take a particular form when the H-flux is non-vanishing. The classification of maps thus obtained include the known abelian/non-abelian/Poisson-Lie T-duality transformations, Yang-Baxter deformations, as well as novel generalisations of them. This talk is based on https://arxiv.org/abs/2102.04498. The seminar will take place on Zoom Zoom Meeting ID 927-576-096 Password 008501 You must use your real name and affiliation to join the meeting. This way we can identify you in the waiting room and give you access to the seminar. You can join the meeting by clicking on the following link https://mpi-aei.zoom.us/j/927576096?pwd=L1JoOUN5SmNvRjg4S0V2NlpIWld0Zz09 Please note that if you are watching the seminar using a web browser without installing the Zoom application, you may experience problems joining the seminar. If you are stuck in the waiting room for a long time with the notice that a host must admit you, please refresh your browser. In many instances, this will allow you to then gain access to the seminar. Details of all upcoming seminars can be found on Google Calendar https://calendar.google.com/calendar/embed?src=exft.seminars%40gmail.com&...;. Recordings of previous talks can be found at https://sites.google.com/view/egseminars/. Best wishes, Franz Ciceri, Gianluca Inverso, Emanuel Malek, Charles Strickland-Constable, Dan Thompson -- Dr. Emanuel Malek Junior Research Group Leader Humboldt-Universität zu Berlin, Institute of Physics, Zum Großen Windkanal 6, 12489 Berlin, Germany Email: emanuel.malek@physik.hu-berlin.de<mailto:emanuel.malek@physik.hu-berlin.de> Website: http://hu-berlin.de/stringfluxvacua