Yoshinori Namikawa

activity

20232026

collaborators

4 papers

math.AG2026

Towards a characterization of toric hyperkähler varieties among symplectic singularities II

Yoshinori Namikawa

This is a continuation of arXiv: 2408.03012. We answer affirmatively Question 5.10 posed in the previous article. More precisely, let $(X, ω)$ be a conical symplectic variety of di…

math.AG2026

Notes on Poisson deformations of symplectic varieties

Yoshinori Namikawa

In this article we give corrections and addendum to the article ``Flops and Poisson deformations of symplectic varieties, Publ. Res. Inst. Math. Sci. {\bf 44} (2008) 259 - 314''.

math.AG2024

Towards a characterization of toric hyperkähler varieties among symplectic singularities

Yoshinori Namikawa

Let $(X, ω)$ be a conical symplectic variety of dimension $2 n$ which has a projective symplectic resolution. Assume that $X$ admits an effective Hamiltonian action of an $n$ -dimens…

math.AG2023

Toric hyperkähler varieties and Q-factorial terminalizations

Yoshinori Namikawa

A toric hyperkähler variety is determined by combinatorial data A and $α$ . Here A is an integer valued matrix and $α$ is a character of an algebraic torus $T^{d}$ . $Y (A, α)$ is a cre…