BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Twisted derived equivalences and string theory dualities with B-fi
 eld - Jonathan Rosenberg (University of Maryland\, College Park)
DTSTART:20220720T123000Z
DTEND:20220720T133000Z
UID:TALK175019@talks.cam.ac.uk
DESCRIPTION:It's well-known that D-branes on a type IIB string theory comp
 actified onan algebraic variety X (usually a Calabi-Yau variety) are class
 ified by the(bounded) derived category D(X) of coherent sheaves on X. &nbs
 p\;Thus dualitiesbetween string theories on two varieties X and Y are mani
 fested byequivalences D(X) &cong\; D(Y). &nbsp\;For orientifold string the
 ories with non-trivialB-field\, the situation is more complicated\, and so
 metimes D(X) has to be replacedby D(X\, &alpha\;)\, where &alpha\; is a no
 ntrivial class in the Brauer group. &nbsp\;We discusscases where string th
 eory dualities are reflected in equivalences ofderived equivalences of cat
 egories of twisted coherent sheaves\,as well as interesting possible purel
 y algebraic generalizations.\nThis is based in part on joint work with Cha
 rles Doran\, Andreas Malmendier and Stefan Mendez-Diez\, andwith Niranjan 
 Ramachandran.
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR