Hisanori Ohashi

most citedFinite groups of automorphisms of Enriques surfaces and the Mathieu group

M_{12}

11 citations · 11 across the 2 of their papers we have counts for

collaborators

2 papers

math.AG2014★ 11 cited

Finite groups of automorphisms of Enriques surfaces and the Mathieu group $M_{12}$

Shigeru Mukai, Hisanori Ohashi

An action of a group $G$ on an Enriques surface $S$ is called Mathieu if it acts on $H^{0} (2 K_{S})$ trivially and every element of order 2, 4 has Lefschetz number 4. A finite group $G$ …

math.AG2010

Hutchinson-Weber involutions degenerate exactly when the Jacobian is Comessatti

Hisanori Ohashi

We consider the Jacobian Kummer surface $X$ of a genus two curve $C$ . We prove that the Hutchinson-Weber involution on $X$ degenerates if and only if the Jacobian $J (C)$ is Comessa…

Finite groups of automorphisms of Enriques surfaces and the Mathieu group M12​

Hutchinson-Weber involutions degenerate exactly when the Jacobian is Comessatti

Finite groups of automorphisms of Enriques surfaces and the Mathieu group $M_{12}$