activity
20082026
most citedThe mean curvature flow for invariant hypersurfaces in a Hilbert space with an almost free group action

6 citations · 23 across the 42 of their papers we have counts for

collaborators

44 papers

math.DG2026

Equifocal hypersurfaces in symmetric spaces of compact type and backward mean curvature flows

Kurando Baba, Naoyuki Koike

We first derive a formula for the mean curvature and the squared norm of the shape operator of equifocal hypersurfaces in simply-connected irreducible symmetric spaces of compact t…

math.DG2025

A construction of curvature-adapted hypersurfaces in the product of symmetric spaces

Naoyuki Koike

In this paper, we give a construction of curvature-adapted hypersurfaces in the product of (Riemannian) symmetric spaces (). By this constr…

math.DG2025

Mean curvature flow for principal orbits of Hermann actions on rank two symmetric spaces

Naoyuki Koike, Sakura Nakaoka

In this paper, we illustrate the behaviour of the mean curvature flows starting from principal orbits of any commuting Hermann action of cohomogeneity two on irreducible rank two R…

math.DG2024

Isotropy invariant graphical mean curvature flows in warped products

Naotoshi Fujihara, Naoyuki Koike

In this paper, we study the graphical mean curvature flow in a warped product , where is a symmetric space of compact type, is an open interval, and …

math.DG2023

Isoparametric submanifolds in a Riemannian Hilbert manifold

Naoyuki Koike

In this paper, we introduce the notion of a regularizable submanifold in a Riemannian Hilbert manifold. This submanifold is defined as a curvature-invariant submanifold such that i…

math.DG2023

Calabi-Yau structures on the complexifications of rank two symmeric spaces

Naoyuki Koike

For a (Reimannian) symmetric space of compact type, the natural action of on its complexification (which is an anti-Kaehler symmetric space)…