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math.AG2025
Finding the walls for quiver moduli
Hans Franzen, Gianni Petrella, Rachel Webb
We give an effective characterisation of the walls in the variation of geometric invariant theory problem associated to a quiver and a dimension vector.
math.AG2025
Crepant Transformation Conjecture For the Grassmannian Flop
Wendelin Lutz, Qaasim Shafi, Rachel Webb
We prove an explicit form of the Crepant Transformation Conjecture for Grassmannian flops. Our approach uses abelianization to first relate the restrictions of the Lagrangian cones…