3 papers
math.AG2026
Echoes of phantoms on rational surfaces
Shihao Ma, Yirui Xiong, Song Yang
We construct the first countably infinite family of new universal phantom categories on a smooth rational surface, namely the blow-up of the complex projective plane at ten points…
math.AG2025
A new phantom on a rational surface
Shihao Ma, Yirui Xiong, Song Yang
We construct a universal phantom subcategory on the blow-up of the complex projective plane at 11 general points. This phantom subcategory is the orthogonal complement of a non-ful…
math.AG2025
Quintic genus 2 curves, stable pairs and wall-crossing
Shihao Ma, Song Yang
This paper studies wall crossings in Bridgeland stability for the moduli space of Pandharipande--Thomas stable pairs associated with quintic genus 2 curves in the complex projectiv…