論文

• Udo Hertrich-Jeromin, Yshihiko Suyama, Masaaki Umehara, Kotaro Yamada. A duality for conformally flat hypersurfaces, Beitraege zur Algebra und Geometrie / Contributions to Algebra and Geometry, Vol. 56, No. 2, 655-676, Oct. 2015.
• Shoichi Fujimori, Young Wook Kim, Sung-Eun Koh, Wayne Rossman, Heayong Shin, Masaaki Umehara, Kotaro Yamada, Seong-Deog Yang. Zero mean curvature surfaces in Lorentz-Minkowski 3-space and 2-dimensional fuluid mechanics, Math. J. Okayama Univ., Vol. 57, No. 1, pp. 173-200, Jan. 2015.
• Shoichi Fujimori, Young Wook Kim, Sung-Eun Koh, Wayne Rossman, Heayong Shin, Masaaki Umehara, Kotaro Yamada, Seong-Deog Yang. Zero mean curvature surfaces in Lorentz-Minkowski 3-space which change type across a light-like line, OSAKA JOURNAL OF MATHEMATICS, Vol. 57, No. 1, pp. 285-297, Jan. 2015.

著書

• 梅原雅顕, 山田光太郎. 曲線と曲面・微分幾何的アプローチ（改訂版）, 裳華房, Feb. 2015.

国内会議発表 (査読なし・不明)

• 梅原雅顕. 曲面の臍点の指数について, 福岡大学微分幾何研究会, Nov. 2015.

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