2 citations · 5 across the 7 of their papers we have counts for
8 papers
Wall-crossing formula for framed quiver moduli
Ryo Ohkawa
We investigate the wall-crossing phenomena for moduli of framed quiver representations. These spaces are expected to be highly useful in capturing the representation theoretic esse…
Wall-crossing for vortex partition function and handsaw quiver varierty
Ryo Ohkawa, Yutaka Yoshida
We investigate vortex partition functions defined from integrals over the handsaw quiver varieties of type via wall-crossing phenomena. We consider vortex partition functio…
Functional equations of Nekrasov functions proposed by Ito-Maruyoshi-Okuda
Ryo Ohkawa
We prove functional equations of Nekrasov partition functions for -singularity, suggested by Ito-Maruyoshi-Okuda. Our proof uses the method by Nakajima-Yoshioka based on the…
The FFRT property of two-dimensional normal graded rings and orbifold curves
Nobuo Hara, Ryo Ohkawa
This study examines the finite -representation type (abbr. FFRT) property of a two-dimensional normal graded ring in characteristic , using notions from the theory of a…
Wall-crossing between stable and co-stable ADHM data
Ryo Ohkawa
We prove formula between Nekrasov partition functions defined from stable and co-stable ADHM data for the plane following method by Nakajima-Yoshioka based on the theory of wall-cr…
Frobenius morphisms and derived categories on two dimensional toric Deligne-Mumford stacks
Ryo Ohkawa, Hokuto Uehara
For a toric Deligne-Mumford (DM) stack, we can consider a certain generalization of the Frobenius endomorphism. For such an endomorphism on a two-dimensional toric DM stack, we sho…
Flips of moduli of stable torsion free sheaves with on
Ryo Ohkawa
We study flips of moduli schemes of stable torsion free sheaves as wall-crossing phenomena of moduli schemes of stable modules over certain finite dimensional algebra. They are des…
Moduli of Bridgeland semistable objects on
Ryo Ohkawa
We give another proof of Le Potier's result and some variants on moduli spaces of semistable sheaves on the projective plane, using the Bridgeland stability conditions. As an appli…