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J-GLOBAL ID:200901003602962803   Update date: Jan. 30, 2024

Yamada Koutaro

ヤマダ コウタロウ | Yamada Koutaro
Affiliation and department:
Job title: Professor
Research field  (1): Geometry
Research keywords  (2): Differential Geometry ,  微分幾何学
Research theme for competitive and other funds  (48):
  • 2022 - 2027 ワイエルストラス表現公式の類似と特異点における延長問題
  • 2021 - 2026 Differential geometrey of singularities and its applications
  • 2017 - 2022 Singularities of surfaces and hypersurfaces in Lorentzian space forms
  • 2016 - 2021 Study on geometric structures of singularities of the mean curvature type flow
  • 2014 - 2019 Promotion of the study of curves, surfaces and hypersurfaces with singularities from the view point of differential geometry
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Papers (13):
  • S. Akamine, M. Umehara, K. Yamada. Improvement of the Bernstein-type theorem for space-like zero mean curvature graphs in Lorentz-Minkowski space using fluid mechanical duality. Proceedings of the American Mathematical Society, Series B. 2020. 7. 2. 17-27
  • S. Akamine, A. Honda, M. Umehara, K. Yamada. Bernstein-Type Theorem for Zero Mean Curvature Hypersurfaces Without Time-like Points in Lorentz-Minkowski Space. Bulletin of the Brazilian Mathematical Society, New Series. 2020. 52. 1. 175-181
  • A. Honda, K. Naokawa, M. Umehara, K. Yamada. Isometric realization of cross caps as formal power series and its applications. Hokkaido Mathematical Journal. 2019. 48. 1. 1-44
  • M. Kokubu, ROSSMAN FREMONT Wayne, Kentaro SAJI, M. Umehara, K. Yamada. Addendum: singularities of flat fronts in hyperbolic space. Pacific J. Math. 2018. 294. 2. 505-509
  • L. F. Martins, K. Saji, M. Umehara, K. Yamada. Behavior of Gaussian Curvature and Mean Curvature Near Non-degenerate Singular Points on Wave Fronts. GEOMETRY AND TOPOLOGY OF MANIFOLDS. 2016. 154. 247-281
more...
MISC (5):
  • Umehara Msaaki, Kokubu Masatoshi, Yamada Kotaro. Flat Fronts in Hyperbolic 3-space (General study on Riemannian submanifolds). RIMS Kokyuroku. 2002. 1292. 1-11
  • 梅原 雅顕, 國分 雅敏, 山田 光太郎. 3次元双曲型空間における平坦な曲面 (部分多様体の微分幾何学およびその周辺領域の研究). 数理解析研究所講究録. 2001. 1236. 49-59
  • W Rossman, M Umehara, K Yamada. Irreducible constant mean curvature 1 surfaces in hyperbolic space with positive genus. TOHOKU MATHEMATICAL JOURNAL. 1997. 49. 4. 449-484
  • M UMEHARA, K YAMADA. COMPLETE-SURFACES OF CONSTANT MEAN CURVATURE-1 IN THE HYPERBOLIC 3-SPACE. ANNALS OF MATHEMATICS. 1993. 137. 3. 611-638
  • M UMEHARA, K YAMADA. A PARAMETRIZATION OF THE WEIERSTRASS FORMULAS AND PERTURBATION OF COMPLETE MINIMAL-SURFACES IN R3 INTO THE HYPERBOLIC 3-SPACE. JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK. 1992. 432. 1. 93-116
Education (4):
  • - 1989 Keio University Graduate School, Division of Science and Engineering
  • - 1989 Keio University Graduate School of Science and Technology
  • - 1984 Keio University Faculty of Engineering
  • - 1984 Keio University
Professional career (2):
  • Doctor of Science
  • 博士(理学)
Awards (1):
  • 1995 - 幾何学賞
Association Membership(s) (1):
日本数学会
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