The norm estimate of the difference between the Kac operator and Schrödinger semigroup. II: The general case including the relativistic case. Ichinose, Takashi; Takanobu, Satoshi — 2000 Electronic Journal of Probability [electronic only]
On the spectra of tensor products of linear operators in Banach spaces. Takashi Ichinose — 1970 Journal für die reine und angewandte Mathematik
On the spectral properties of tensor products of linear operators in Banach spaces Takashi Ichinose — 1982 Banach Center Publications
Essential selfadjointness of the Weyl quantized relativistic hamiltonian Takashi Ichinose — 1989 Annales de l'I.H.P. Physique théorique
On Kato's inequality for the Weyl quantized relativistic Hamiltonian. Takashi Ichinose; Tetsuo Tsuchida — 1992 Manuscripta mathematica
On essential selfadjointness of the Weyl quantized relativistic Hamiltonian. Takashi Ichinose; Tetsuo Tsuchida — 1993 Forum mathematicum