Kyo Nishiyama

activity

20032026

most citedTheta lifting of nilpotent orbits for symmetric pairs

16 citations · 39 across the 24 of their papers we have counts for

collaborators

28 papers

math.RT2026

Symmetric spaces and skew multiplicity free representations

Kieran Calvert, Kyo Nishiyama, Pavle Pandžić

Let $G$ be a non-compact connected reductive real Lie group and $P$ its parabolic subgroup. We give a list of equivalent conditions for $P$ to have an abelian unipotent radic…

math.RT2026

Double flag varieties of Levi type with a finite number of orbits

Lucas Fresse, Kyo Nishiyama

We consider a double flag variety of the form $L / Q \times G / P$ where $G$ is a connected reductive group and $L$ is a Levi subgroup of $G$ . The Levi subgroup $L$ acts diagonally on t…

math.RT2025

Orbit structures on real double flag varieties for the Siegel parabolic subgroups

Kyo Nishiyama, Taito Tauchi

Let $G$ be a connected reductive algebraic group over $R$ , and $H$ its symmetric subgroup. For parabolic subgroups $P_{G} \subset G$ and $P_{H} \subset H$ , the p…

math.RT2025

Real double flag variety for the symmetric pair $(U (p, p), G L_{p} (C))$ and Galois cohomology

Kyo Nishiyama, Taito Tauchi

Let $G$ be the indefinite unitary group $U (p, p)$ , $H ≃ G L_{p} (C)$ its symmetric subgroup, $P_{S}$ the Siegel parabolic subgroup of $G$ , and $B_{H}$ a Borel subgroup of…

math.RT2023

Clifford algebras, symmetric spaces and cohomology rings of Grassmannians