3 papers
math.AG2026
Finite automorphism groups of hypersurfaces via Bott vanishing
Dominic Bunnett, Caroline Namanya
We give a cohomological criterion for the automorphism group scheme of a hypersurface in a smooth Deligne-Mumford stack to be discrete in tame characteristics. The criterion conver…
math.AG2023
Group Actions from Algebraic Flops
Caroline Namanya
This paper constructs derived autoequivalences associated to an algebraic flopping contraction X --> X_con, where X is quasi-projective with only mild singularities. These functors…
math.GR2022
Pure Braid Group Presentations via Longest Elements
Caroline Namanya
This paper gives a new, simplified presentation of the classical pure braid group. The generators are given by the squares of the longest elements over connected subgraphs, and we…