プレプリント

   1. Reconstruction of weak bialgebra  maps and  its applications, http://arxiv.org/abs/2002.12568.

　2. (with T.Kogiso, K.Miyamoto, X.Ren and K.Yanagawa), Arithmetic on q-deformed rational numbers, to appear in Arnold Math. J., http://arxiv.org/abs/2403.08446

   1. Fusion algebras for orbifold models

   2. On the quasitriangular structures of the group Hopf algebra of a non-abelian group