Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Yasuo Matsushita"'
This volume contains a valuable collection of research articles by active and well-known mathematicians in differential geometry and mathematical physics, contributed to mark Professor Kouei Sekigawa's 60th birthday. The papers feature many new and s
Publikováno v:
Physics Letters A. 380:2823-2827
In this study, the parametric resonances of pinned intrinsic localized modes (ILMs) were investigated by computing the unstable regions in parameter space consisting of parametric excitation amplitude and frequency. In the unstable regions, the pinne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f69562d0a5b1aca23e290bab90158589
https://doi.org/10.1016/j.physleta.2016.06.048
https://doi.org/10.1016/j.physleta.2016.06.048
Autor:
Yasuo Matsushita
Publikováno v:
Progress in Differential Geometry, K. Shiohama, ed. (Tokyo: Mathematical Society of Japan, 1993)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9e8df9a62aae7311496fd7ce38f64cd
https://doi.org/10.2969/aspm/02210153
https://doi.org/10.2969/aspm/02210153
Autor:
Peter R. Law, Yasuo Matsushita
Publikováno v:
Springer Proceedings in Mathematics & Statistics ISBN: 9789811055553
The famous Goldberg conjecture (Goldberg, Proc Am Math Soc 21, 96–100, 1969) [8] states that the almost complex structure of a compact almost-Kahler Einstein Riemannian manifold is Kahler. It is true if the scalar curvature of the manifold is nonne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d83b53b9e3749ccb86c957f191148e4a
https://doi.org/10.1007/978-981-10-5556-0_9
https://doi.org/10.1007/978-981-10-5556-0_9
Publikováno v:
IEICE Proceeding Series. 1:474-477
ySchool of Engineering, The University of Shiga Prefecture2500 Hassaka-cho, Hikone, Shiga 522-8533, JapanzDepartment of Electrical Engineering, Kyoto UniversityKatsura, Nishikyo, Kyoto 615-8510, JapanEmail: kimura.m@e.usp.ac.jp, matsushita.y@e.usp.ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98ab22e87cb7fc05a1e3425318a0e5cd
https://doi.org/10.15248/proc.1.474
https://doi.org/10.15248/proc.1.474
Publikováno v:
IEICE Proceeding Series. 2:282-285
ySchool of Engineering, The University of Shiga Prefecture2500 Hassaka-cho, Hikone, Shiga 522-8533, JapanzDepartment of Electrical Engineering, Kyoto UniversityKatsura, Nishikyo, Kyoto 615-8510, JapanEmail: kimura.m@e.usp.ac.jp, matsushita.y@e.usp.ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::644b28a662cbee65084889b2f0055c93
https://doi.org/10.15248/proc.2.282
https://doi.org/10.15248/proc.2.282
Autor:
Yasuo Matsushita, Peter R. Law
Publikováno v:
Journal of Geometry and Physics. 65:35-44
By a real α β -geometry we mean a four-dimensional manifold M equipped with a neutral metric h such that ( M , h ) admits both an integrable distribution of α -planes and an integrable distribution of β -planes. We obtain a local characterization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0183368020ab34d37958779166c41381
https://doi.org/10.1016/j.geomphys.2012.11.010
https://doi.org/10.1016/j.geomphys.2012.11.010
Publikováno v:
Journal of Geometry. 90:56-65
We call a pseudo-Riemannian 4-manifold, which admits a field of parallel null 2-planes, a Walker 4-manifold. A pseudo-Riemannian metric of a Walker 4-manifold is necessarily of neutral signature, and it admits an orthogonal almost complex structure.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fb9f258c4b01ff6aacff4d6e018f323
https://doi.org/10.1007/s00022-008-1999-y
https://doi.org/10.1007/s00022-008-1999-y
Autor:
Yasuo Matsushita, Peter R. Law
Publikováno v:
Communications in Mathematical Physics. 282:577-623
A four-dimensional Walker geometry is a four-dimensional manifold M with a neutral metric g and a parallel distribution of totally null two-planes. This distribution has a natural characterization as a projective spinor field subject to a certain con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08597356fe41be13291754a44c582455
https://doi.org/10.1007/s00220-008-0561-y
https://doi.org/10.1007/s00220-008-0561-y
Autor:
Yasuo Matsushita, Eduardo García-Río, Ramón Vázquez-Lorenzo, O. Muškarov, José Carlos Díaz-Ramos, Johann Davidov
Publikováno v:
Journal of Geometry and Physics. 58:307-323
A local description of proper Hermitian–Walker structures that are locally conformally Kahler, self-dual, ∗-Einstein or Einstein is given. This is used to supply examples of indefinite Einstein strictly almost Hermitian structures showing that an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb98b2623e68a8703a495aa56e00e97c
https://doi.org/10.1016/j.geomphys.2007.11.006
https://doi.org/10.1016/j.geomphys.2007.11.006