Showing math.AGShow all
2 papers · 1 filter
math.AG2025
A Lemma on Leech-like Lattices
Zhiwei Zheng
A Leech pair is defined as a pair , where is a positive definite even lattice without roots, equipped with a faithful action of a finite group , such that the invaria…
math.AG2024
Finite Groups of Symplectic Automorphisms of Supersingular K3 surfaces in Odd Characteristics
Bin Wang, Zhiwei Zheng
In 2009, Dolgachev-Keum showed that finite groups of tame symplectic automorphisms of K3 surfaces in positive characteristics are subgroups of the Mathieu group of degree 23. In th…