Tootfinder

On the Virtual Euler Characteristic of the Moduli Space of Stable Pairs on Surfaces
Ana Pavlakovi\'c
https://arxiv.org/abs/2505.23531 https://

On the Virtual Euler Characteristic of the Moduli Space of Stable Pairs on Surfaces
We study the stable pair theory on toric surfaces and determine the virtual tangent space over the fixed point loci. Further, we present a program to compute the virtual Euler characteristic, illustrated by the case of the projective plane. As an application, conjectures regarding rationality and symmetry are supported by verification of a special case.

I can't stop thinking of 'The Running Man' whenever I see articles about virtual (animal) fences:
https://www.bbc.co.uk/news/articles/cj4229k744lo

Cambridge cows get GPS collars to stop them falling in river
A council says two to four fall into the water in a city centre during grazing season each year.