3 papers
math.AG2025
Twisted stable maps with colliding points
Martin Olsson, Rachel Webb
We study moduli spaces of stable maps from pointed curves, where the points are allowed to coincide, with target a tame Deligne-Mumford stack. This generalizes the Abramovich-Visto…
math.AG2024
Curves with colliding points: logarithmic and stacky
Martin Olsson, Rachel Webb
We introduce a new notion of generalized log twisted curves, which are marked nodal curves with additional data at the marked points. In the case when the markings are distinct thi…
math.AG2024
Ample vector bundles and moduli of tame stacks
Daniel Bragg, Martin Olsson, Rachel Webb
We explain how to define an embedding of a tame stack over a noetherian ring into a certain generalization of a weighted projective stack using a notion of ample vector bundle on t…