IAS Fellows' Seminar - Inclusive Peace Processes: Exploring the Opportunities and Challenges to Engaging with Religious Actors

Contact enquiries.ias@durham.ac.uk for more information about this event.

Dhruv Ranganathan: What’s in a tropical curve?

Tropical curves are combinatorial objects, essentially decorated graphs, that appear as limiting objects of families of Riemann surfaces. Additional structure on Riemann surfaces are reflected in beautiful and subtle combinatorial features on the graphical side. For instance, features of the complex function theory, moduli theory, and enumerative geometry of curves all manifest themselves on the combinatorial side. The result is a rich network of conjectures and predictions, many of which have resulted in new theorems. I will give an introduction to this circle of ideas and outline some recent developments.

Contact jack.g.shotton@durham.ac.uk for more information about this event.

Prof. Martin Goodman: Philo on Extreme Allegorists

Contact francis.watson@durham.ac.uk for more information about this event.

Giuseppe de Laurentis: Spinor-helicity amplitudes and the CHY formalism

I will review a technique to obtain analytical spinor-helicity rational coefficients for loop amplitudes from floating-point numerical evaluations, with explicit examples for QCD processes. Afterwards, I will discuss the Cachazo-He-Yuan formalism for massless scattering. I will show how arbitrary-precision numerical solutions of the scattering equations lead to compact analytical tree-level amplitudes in a variety of theories, including the first complete set of five-point (DF)^2 amplitudes.

Contact sagharsadat.hosseinisemnani@durham.ac.uk, gabriel.arenas-henriquez@durham.ac.uk for more information about this event.