Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Setsuo Nagai"'
Autor:
Clotilde Minfray, Ph. Kapsa, Gaylord Guillonneau, Jules Galipaud, Takeshi Kunishima, Takanori Kurokawa, Setsuo Nagai, Gaëtan Bouvard, J.-Ch. Abry, Vincent Fridrici
Publikováno v:
Tribology International
Tribology International, Elsevier, 2021, 153, pp.106578-. ⟨10.1016/j.triboint.2020.106578⟩
Tribology International, Elsevier, 2021, 153, pp.106578-. ⟨10.1016/j.triboint.2020.106578⟩
In this study, the influence of temperature on the tribological properties of unreinforced or glass-fiber reinforced PA66 in contact with carbon steel under boundary lubrication with grease was studied when considering the temperature dependence of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce937fcb8b5848d7ada531966dd0ba62
https://hal.archives-ouvertes.fr/hal-03491359
https://hal.archives-ouvertes.fr/hal-03491359
Autor:
Vincent Fridrici, Jean-Christophe Abry, Setsuo Nagai, Takeshi Kunishima, Gaëtan Bouvard, Yasuharu Nagai, Philippe Kapsa, Takanori Kurokawa
Publikováno v:
Wear
Wear, Elsevier, 2020, 462, pp.203500-. ⟨10.1016/j.wear.2020.203500⟩
Wear, Elsevier, 2020, 462, pp.203500-. ⟨10.1016/j.wear.2020.203500⟩
Polyamide 66 is widely used for sliding parts that are in contact with steel under grease lubrication, including worm gears or bearing retainers. To meet the requirements for downsizing these parts and for their use under severe conditions, reinforce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1685dfa73fa7480f326cf53fffefb299
https://doi.org/10.1016/j.wear.2020.203500
https://doi.org/10.1016/j.wear.2020.203500
Publikováno v:
Geometriae Dedicata. 149:161-176
In this paper we determine the real hypersurfaces for which the structure Jacobi operator commutes over both the Ricci tensors and structure tensors (for a definition of the operator see Sect. 1). We prove that such hypersurfaces are homogneous real
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df36dbb6ee1315e73574ea160a8455fc
https://doi.org/10.1007/s10711-010-9474-y
https://doi.org/10.1007/s10711-010-9474-y
Autor:
Setsuo Nagai, U-Hang Ki
Publikováno v:
Journal of Geometry. 94:123-142
Let M be a real hypersurface with almost contact metric structure \({(\phi, \xi, \eta, g)}\) in a complex projective space \({P_{n}\mathbb{C}}\) . A Real hypersurface M is said to be a Hopf hypersurface if ξ is principal. In this paper we investigat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7db4e304e88d7f0a3a469a357cf469b
https://doi.org/10.1007/s00022-009-0006-6
https://doi.org/10.1007/s00022-009-0006-6
Autor:
Setsuo Nagai
Publikováno v:
Tsukuba J. Math. 38, no. 2 (2015), 207-225
Ki and Nakagawa [Tohoku Math. J., 39, 27-40 (1987)] characterized the minimal isoparametric hypersurfaces in a sphere that have three distinct constant principal curvatures from the stand point of the Ricci tensor. In this paper we generalize their r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71843d3281be62c46a4e94737f53fd78
http://projecteuclid.org/euclid.tkbjm/1429103722
http://projecteuclid.org/euclid.tkbjm/1429103722
Autor:
Setsuo Nagai
Publikováno v:
Journal of the Australian Mathematical Society. 74:87-100
We determine the naturally reductive homogeneous real hypersurfaces in the family of curvature-adapted real hypersurfaces in quaternionic projective space HPn(n ≥ 3). We conclude that the naturally reductive curvature-adapted real hypersurfaces in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::980fc538c16bf3389821ad25b2f932b6
https://doi.org/10.1017/s1446788700003141
https://doi.org/10.1017/s1446788700003141
The classification of naturally reductive homogeneous real hypersurfaces in complex projective space
Autor:
Setsuo Nagai
Publikováno v:
Archiv der Mathematik. 69:523-528
We completely classify the naturally reductive homogeneous real hypersurfaces in a complex projective space. We conclude that only homogeneous real hypersurfaces of type (A) are naturally reductive.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd4aea7f5f3800b3b55a35ba00aa8442
https://doi.org/10.1007/s000130050155
https://doi.org/10.1007/s000130050155
Autor:
Setsuo Nagai
Publikováno v:
Archiv der Mathematik. 65:342-351
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ac86380edc4032f5d99dd0febcf3b79
https://doi.org/10.1007/bf01195546
https://doi.org/10.1007/bf01195546
Publikováno v:
Tokyo J. of Math. 30, no. 2 (2007), 441-454
Let $M$ be a real hypersurface with almost contact metric structure $(\phi ,\xi ,\eta ,g)$ in a nonflat complex space form $M_{n}(c)$. We denote by $S$ be the Ricci tensor of $M$. In the present paper we investigate real hypersurfaces with constant s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3784a1ce0c49d566c6692b6602f12c1
http://projecteuclid.org/euclid.tjm/1202136687
http://projecteuclid.org/euclid.tjm/1202136687
Autor:
U-Hang Ki, Setsuo Nagai
Publikováno v:
Tsukuba J. Math. 29, no. 2 (2005), 511-532
We know the fact that there are no real hypersurfaces with parallel Ricci tensors in a nonflat complex space form (cf. [5]). In this paper we investigate real hypersurfaces in a nonflat complex space form using some conditions of the Ricci tensor $S$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c88905864db540fa2a37ae86acee316b
https://doi.org/10.21099/tkbjm/1496164968
https://doi.org/10.21099/tkbjm/1496164968