This Week

Here is a selection of seminars that might be of interest to string theorists in Oxford:

On Monday, January 15, at 12:45 in L3, a seminar in the String Theory series:
String Theory - No Seminar (In view of the Abel Lectures)
On Monday, January 15, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in the Astrophysics Colloquia series:
Prof. Roman Rafikov (DAMTP)
How do protoplanetary discs accrete
On Tuesday, January 16, at 12:00 in L4, a seminar in the Relativity series:
Dr Yvonne Geyer (IAS Princeton)
Loops from the Nodal Riemann Sphere: 2-loop gravity amplitudes from the Ambitwistor String
On Thursday, January 18, at 13:00 in Dalitz Institute, a seminar in the Dalitz Seminar in Fundamental Physics series:
Christos Tsagas (Aristotle University of Thessaloniki)
The peculiar Jeans length: theory and implications
On Thursday, January 18, at 16:00 in L6, a seminar in the Number Theory series:
Carl Wang-Erickson (Imperial College, London)
Mazur's Eisenstein ideal
Further information: In his landmark 1976 paper 'Modular curves and the Eisenstein ideal', Mazur studied congruences modulo p between cusp forms and an Eisenstein series of weight 2 and prime level N. He proved a great deal about these congruences, and also posed some questions: how many cusp forms of a given level are congruent to the Eisenstein series? How big is the extension generated by their coefficients? In joint work with Preston Wake, we give an answer to these questions in terms of cup products (and Massey products) in Galois cohomology. Time permitting, we may be able to indicate some partial generalisations of Mazur's results to square-free level.
On Thursday, January 18, at 16:15 in Dennis Sciama Lecture Theatre, a seminar in the Theoretical Particle Physics series:
Alon Faraggi (University of Liverpool)
The quest for unification
On Friday, January 19, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in the Theoretical Physics Colloquia series:
Siddharth Parameswaran (Oxford)
Quantum order and criticality at infinite temperature