2 papers
math.AG2023
Number of full exceptional collections modulo spherical twists for elliptic orbifolds
Atsushi Takahashi, Hongxia Zhang
This paper calculates the number of full exceptional collections modulo an action of a group as the set generated by spherical twists for an abelian category of coherent sheaves on…
math.RT2023
Geometric model for weighted projective lines of type
Jianmin Chen, Shiquan Ruan, Hongxia Zhang
We give a geometric model for the category of coherent sheaves over the weighted projective line of type in terms of an annulus with marked points on its boundary. We estab…