Frobenius and spherical codomains and neighbourhoods Abstract: In this talk I will report on a joint work with Ciaran Meachan. Given an exact functor between triangulated categories, one can try to compare its left and right adjoint. In some special cases, it is possible to enforce that both adjoints are equal (i.e. the functor becomes
Title: Coxeter Friezes and p-angulations Abstract: A Coxeter frieze is an infinite horizontal array of positive real numbers satisfying a simple local condition. Coxeter friezes were defined in 1971 and have been studied intensively in the past decade, because they form a nexus between combinatorics, geometry, mathematical physics, and representation theory. It is a classic
Title: Cones and symmetries of projective varieties Abstract: A smooth projective variety can be viewed as a compact manifold, but its cohomology groups have extra structure: the classes of subvarieties of a given dimension span a convex cone in the relevant (real) cohomology group. For some classes of varieties these cones are easy to compute,