1 citations · 1 across the 5 of their papers we have counts for
6 papers
The intersection of two real flag manifolds in a complex flag manifold, and the canonical form of a compact symmetric triad
Kurando Baba, Osamu Ikawa, Shinji Ohno
The necessary and sufficient conditions for the intersection of two real flag manifolds in a complex flag manifold to be discrete are stated including a previous known result. The…
The intersection of two real flag manifolds in a complex flag manifold
Osamu Ikawa, Hiroshi Iriyeh, Takayuki Okuda +2
We give a necessary and sufficient condition for two real flag manifolds, which are not necessarily congruent, in a complex flag manifold to intersect transversally in terms of the…
Double Satake diagrams and canonical forms in compact symmetric triads
Kurando Baba, Osamu Ikawa
In this paper, we first introduce the notion of double Satake diagrams for compact symmetric triads. In terms of this notion, we give an alternative proof for the classification th…
A duality between non-compact semisimple symmetric pairs and commutative compact semisimple symmetric triads and its general theory
Kurando Baba, Osamu Ikawa, Atsumu Sasaki
The present paper investigates a natural generalization of the duality between Riemannian symmetric pairs of compact type and those of non-compact type à la É. Cartan. The main res…
Orbits of s-representations with degenerate Gauss mappings
Osamu Ikawa, Takashi Sakai, Hiroyuki Tasaki
In this paper we study tangentially degeneracy of the orbits of s-representations in the sphere. We show that an orbit of an s-representation is tangentially degenerate if and only…
Weakly reflective submanifolds and austere submanifolds
Osamu Ikawa, Takashi Sakai, Hiroyuki Tasaki
We introduce the notion of a weakly reflective submanifold, which is an austere submanifold with a certain global condition, and study its fundamental properties. Using these, we d…