University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Extensions of Grothendieck's theorem on principal bundles over the projective line

  Browse A-Z

Log in

University Account External (via Google)

🔐 Log In

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

ℹī¸ Information

Extensions of Grothendieck's theorem on principal bundles over the projective line

Download to your calendar using vCal

If you have a question about this talk, please contact Mustapha Amrani .

Moduli Spaces

Let G be a split reductive group over a field. Grothendieck and Harder proved that any principal G-bundle over the projective line reduces (essentially uniquely) to a maximal torus. In joint work with Johan Martens, we show that this remains true when the base is a chain of lines, a football, a chain of footballs, a finite abelian gerbe over any of these, or the stack-theoretic quotient of any of these by a torus action.

This talk is part of the Isaac Newton Institute Seminar Series series.

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

Castlereagh Room at St John's College Hybrid: in-person in Cambridge & online via Teams Room 606, Centre for Family Research

Other talks

Ensemble inequivalence for systems with long-range interactions Security Cooperation within Government and between Governments On convective penetration of a buoyant plume into a stably stratified layer Talk TBC Morning Tea and Coffee The rise of local cartography in Europe, 12th-14th century
 

Š 2006-2025 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity