Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Masahito Ohta"'
Autor:
Masahito Ohta
Publikováno v:
São Paulo Journal of Mathematical Sciences. 13:465-474
We consider nonlinear Schrodinger equation with an attractive delta potential in one space dimension. We review some recent results on relations between orbitally unstable standing wave solutions and finite time blowup solutions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2a9ac048db674313dac54e6f7270154
https://doi.org/10.1007/s40863-019-00152-5
https://doi.org/10.1007/s40863-019-00152-5
Autor:
Yoshihide Chino, Toshikatsu Nitta, Jun Kataoka, Kensuke Fujii, Masahito Ohta, Takashi Ishibashi, Tomo Tominaga
Publikováno v:
Asian Journal of Endoscopic Surgery. 12:227-231
INTRODUCTION A 50-year-old Japanese man presented with obstructive jaundice. We performed endoscopic retrograde biliary drainage before biliary decompression. CT showed a thickened gallbladder wall with low-density areas and a 35-mm gallstone; the st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc4c9484149eb45954cf9215eb81835b
https://doi.org/10.1111/ases.12602
https://doi.org/10.1111/ases.12602
Autor:
Masahito Ohta
Publikováno v:
Funkcialaj Ekvacioj. 61:135-143
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e6c84151873b5221cbf7349e1590adc
https://doi.org/10.1619/fesi.61.135
https://doi.org/10.1619/fesi.61.135
Autor:
Noriyoshi, Fukaya, Masahito, Ohta
Publikováno v:
SUT journal of Mathematics = SUT journal of Mathematics. 54(2):131-143
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=jairo_______::1d1c50d28663327a6e8e13d80b20893c
http://id.nii.ac.jp/1275/00002432/
http://id.nii.ac.jp/1275/00002432/
Autor:
Takiko Sasaki, Masahito Ohta
Publikováno v:
Applications of Mathematics. 62:405-432
We consider a Strang-type splitting method for an abstract semilinear evolution equation $${\partial _t}u = Au + F\left( u \right).$$ Roughly speaking, the splitting method is a time-discretization approximation based on the decomposition of the oper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb639085d22a0ae0eef5dc7a08e5b232
https://doi.org/10.21136/am.2017.0020-17
https://doi.org/10.21136/am.2017.0020-17
Publikováno v:
Journal of Differential Equations. 262:1671-1689
We study the stability theory of solitary wave solutions for a type of the derivative nonlinear Schrodinger equation i ∂ t u + ∂ x 2 u + i | u | 2 ∂ x u + b | u | 4 u = 0 . The equation has a two-parameter family of solitary wave solutions of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48b6ffa0e40e3b68e89a5d3ba182afc0
https://doi.org/10.1016/j.jde.2016.10.020
https://doi.org/10.1016/j.jde.2016.10.020
Autor:
Atsushi Takeshita, Hiroshi Kawasaki, Yoshihiro Inoue, Toshikatsu Nitta, Masahito Ohta, Jun Kataoka, Kensuke Fujii, Takashi Ishibashi
Publikováno v:
International Journal of Surgery Case Reports
Highlights • IHPT is difficult to distinguish from malignant tumors • Knowledge of IHPT is necessary to allow for treatment, even without experience.
Introduction Inflammatory hepatic pseudotumor (IHPT) is an important benign liver disease b
Introduction Inflammatory hepatic pseudotumor (IHPT) is an important benign liver disease b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e0b657a30298f72a8386d90416430c3
https://doi.org/10.1016/j.ijscr.2017.05.037
https://doi.org/10.1016/j.ijscr.2017.05.037
Autor:
Masahito Ohta, Shotaro Kawahara
Publikováno v:
Asymptotic Analysis for Nonlinear Dispersive and Wave Equations, K. Kato, T. Ogawa and T. Ozawa, eds. (Tokyo: Mathematical Society of Japan, 2019)
We study a system of nonlinear Schrodinger equations with cubic interactions in one space dimension. The orbital stability and instability of semitrivial standing wave solutions are studied for both non-degenerate and degenerate cases.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6790af5e0660ee32593c71545f388f5b
https://projecteuclid.org/euclid.aspm/1572545241
https://projecteuclid.org/euclid.aspm/1572545241
Autor:
Nataliia Goloshchapova, Masahito Ohta
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We study strong instability (by blow-up) of the standing waves for the nonlinear Schr\"odinger equation with $\delta$-interaction on a star graph $\Gamma$. The key ingredient is a novel variational technique applied to the standing wave solutions bei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ad5c399de05c46ee59a64f50e064fa7
https://doi.org/10.1016/j.na.2020.111753
https://doi.org/10.1016/j.na.2020.111753
Publikováno v:
SIAM Journal on Mathematical Analysis
In this work, we consider the following generalized Boussinesq equation \begin{align*} \partial_{t}^2u-\partial_{x}^2u+\partial_{x}^2(\partial_{x}^2u+|u|^{p}u)=0,\qquad (t,x)\in\mathbb R\times \mathbb R, \end{align*} with $0
Comment: 30 pages
Comment: 30 pages
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d233e7feecfa34527e22c27d3a26e1c
http://arxiv.org/abs/1809.05665
http://arxiv.org/abs/1809.05665