Symmetries in algebra and geometry
10 AM, 14 Jul 2025
Three leading experts show how the idea of symmetry forms key interfaces between algebra and geometry through the lens of their recent work.
Symmetries play a central role in mathematics, linking algebra and geometry. Groups and algebras of symmetries provide geometric realisations of respective abstract structures, while their algebraic properties lead to unexpected geometric insights. In this session, three speakers showcase the rich interplay between these two worlds.
First, Prof. Travis Schedler of Imperial College outlines a programme to classify crepant resolutions of moduli spaces—especially Nakajima quiver varieties—revealing new structures beyond the projective case.
Next, Prof. Evgeny Feigin from Tel-Aviv University describes the geometry of the graph closure of a birational map from projective space to a Grassmannian, including its fibres and embeddings into projectivized cyclic representations of a degenerate Lie algebra.
Finally, Prof. Konstanze Rietsch of King’s College London explores new tropical versions of parametrisations for totally positive Toeplitz matrices, offering a unified perspective on their roles in representation theory and mirror symmetry, and connecting them to the quantum cohomology of flag varieties and canonical bases.
Event information
These talks take place in the seminar room of the London Institute, on the second floor of the Royal Institution. There will be a short coffee break between talks and a longer pause to allow participants to have lunch.
Programme
- 10:00am Arrival & Coffee
- 10:30am Prof. Travis Schedler: Crepant resolutions of moduli spaces and quiver varieties
- 11:40am Prof. Evgeny Feigin: Birational maps to Grassmannians and poset polytopes
- 13:00pm Lunch
- 13:30pm Prof. Konstanze Rietsch: A tropical Edrei theorem
















Speakers

Prof. Travis Schedler is a professor at Imperial College. His research focuses on algebraic and geometric objects connected to mathematical physics, using tools from deformation theory and cohomology, algebraic differential operators, representation theory, and algebraic geometry.

Prof. Evgeny Feigin, from Tel-Aviv University, is interested in questions relating to representation theory, mathematical physics and algebraic geometry. In 2017, he received a Moscow government prize for a series of papers on representation theory of algebras and Lie groups.

Prof. Konstanze Rietsch is based at King’s College London. She works on the geometry of flag varieties and is also interested in total positivity, a theory that allows many geometric objects occuring in Lie theory to be defined, in some sense, over the positive real numbers.