MU
Masaaki Umehara
math.DGdg-gacs.CGCausal typeCentral quadricChristoffel transformationEllipsoidHyperboloidIsothermic surfaceKarcher saddle tower
On Valency
published · living versionsW_rn5u6jv6·v1 · currentpublished
A simple construction of smooth counterexamples to the Loewner and Carathéodory conjectures
with Naoya Ando
1 version
Preprints & journals
71 papers in the corpus · 1997–2025An index formula for hemispheres of a -regular convex closed surface in Euclidean -space2512.23181v3 · Naoya Ando, Masaaki Umehara2025 · 0 citationsarXiv
Explicit analytic functions defining the images of wave-front singularities2512.21518v1 · Kentaro Saji, Masaaki Umehara, Kotaro Yamada2025 · 0 citationsarXiv
Hopf differentials and curvature line flows on time-like CMC surfaces2510.24221v1 · Naoya Ando, Masaaki Umehara2025 · 0 citationsarXiv
Examples of entire zero-mean curvature graphs of mixed-type in Lorentz-Minkowski space via Konderak's formulas2505.21869v1 · Takeki Komatsu, Masaaki Umehara2025 · 0 citationsarXiv
Mannheim-d'Ocagne-Koenderink type formulas for asymptotic directions2412.17244v1 · Toshizumi Fukui, Atsufumi Honda, Masaaki Umehara2024 · 0 citationsarXiv
Cuspidal edges and generalized cuspidal edges in the Lorentz-Minkowski 3-space2409.01603v1 · T. Fukui, R. Kinoshita, D. Pei et al.2024 · 0 citationsarXiv
Deformations of swallowtails in a 3-dimensional space form2406.05971v2 · Kentaro Saji, Masaaki Umehara, Kotaro Yamada2024 · 0 citationsarXiv
Umbilics of surfaces in the Lorentz-Minkowski 3-space2305.07196v1 · Naoya Ando, Masaaki Umehara2023 · 0 citationsarXiv
Null hypersurfaces as wave fronts in Lorentz-Minkowski space2203.02864v3 · Shintaro Akamine, Atsufumi Honda, Masaaki Umehara et al.2022 · 0 citationsarXiv
Symmetries of cross caps2105.01967v2 · Atsufumi Honda, Kosuke Naokawa, Kentaro Saji et al.2021 · 3 citationsarXiv
A generalization of Zakalyukin's lemma, and symmetries of surface singularities2104.03505v2 · Atsufumi Honda, Kosuke Naokawa, Kentaro Saji et al.2021 · 4 citationsarXiv
Analytic extensions of constant mean curvature one geometric catenoids in de Sitter 3-space2011.06757v3 · Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu et al.2020 · 1 citationarXiv
Hypersurfaces with Light-Like Points in a Lorentzian Manifold II2003.12254v1 · Masaaki Umehara, Kotaro Yamada2020 · 2 citationsarXiv
On the existence of four or more curved foldings with common creases and crease patterns1911.07166v3 · Atsufumi Honda, Kosuke Naokawa, Kentaro Saji et al.2019 · 6 citationsarXiv
Curved foldings with common creases and crease patterns1910.06533v3 · Atsufumi Honda, Kosuke Naokawa, Kentaro Saji et al.2019 · 8 citationsarXiv
Null hypersurfaces in Lorentzian manifolds with the null energy condition1910.06608v2 · Shintaro Akamine, Atsufumi Honda, Masaaki Umehara et al.2019 · 3 citationsarXiv
Cuspidal edges with the same first fundamental forms along a knot1908.06609v3 · Atsufumi Honda, Kosuke Naokawa, Kentaro Saji et al.2019 · 5 citationsarXiv
Bernstein-type theorem for zero mean curvature hypersurfaces without time-like points in Lorentz-Minkowski space1907.01754v3 · Shintaro Akamine, Atsufumi Honda, Masaaki Umehara et al.2019 · 7 citationsarXiv
Space-like maximal surfaces containing entire null lines in Lorentz-Minkowski 3-space1907.00739v1 · Shintaro Akamine, Masaaki Umehara, Kotaro Yamada2019 · 8 citationsarXiv
Duality on generalized cuspidal edges preserving singular set images and first fundamental forms1906.02556v5 · Atsufumi Honda, Kosuke Naokawa, Kentaro Saji et al.2019 · 15 citationsarXiv
Extrinsic diameter of immersed flat tori in the 3-sphere II1906.00523v2 · Kazuyuki Enomoto, Yoshihisa Kitagawa, Masaaki Umehara2019 · 0 citationsarXiv
Improvement of the Bernstein-type theorem for space-like zero mean curvature graphs in Lorentz-Minkowski space using fluid mechanical duality1904.08046v2 · Shintaro Akamine, Masaaki Umehara, Kotaro Yamada2019 · 7 citationsarXiv
Hypersurfaces with light-like points1806.09233v3 · Masaaki Umehara, Kotaro Yamada2018 · 0 citationsarXiv
Isometric deformations of wave fronts at non-degenerate singular points1710.02999v3 · Atsufumi Honda, Kosuke Naokawa, Masaaki Umehara et al.2017 · 13 citationsarXiv
Surfaces with light-like points in Lorentz-Minkowski 3-space with applications1707.07396v1 · Masaaki Umehara, Kotaro Yamada2017 · 9 citationsarXiv
Quadrics and Scherk towers.30996480 · Fujimori, S, Hertrich-Jeromin, U, Kokubu, M et al.2020 · 3 citationsMonatshefte fur Mathematik. 2018;186(2):249-279
Isometric realization of cross caps as formal power series and its applications1601.06265v1 · Atsufumi Honda, Kosuke Naokawa, Masaaki Umehara et al.2016 · 9 citationsarXiv
Zero mean curvature entire graphs of mixed type in Lorentz-Minkowski 3-space1511.07954v2 · Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu et al.2015 · 2 citationsarXiv
Analytic extension of Jorge-Meeks type maximal surfaces in Lorentz-Minkowski 3-space1509.05853v1 · Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu et al.2015 · 11 citationsarXiv
Mixed type surfaces with bounded mean curvature in 3-dimensional space-times1508.02514v1 · Atsufumi Honda, Miyuki Koiso, Masatoshi Kokubu et al.2015 · 14 citationsarXiv
Analytic extension of exceptional constant mean curvature one catenoids in de Sitter 3-space1507.06695v2 · Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu et al.2015 · 4 citationsarXiv
Intrinsic properties of surfaces with singularities1409.0281v2 · Masaru Hasegawa, Atsufumi Honda, Kosuke Naokawa et al.2014 · 39 citationsarXiv
Isometric deformations of cuspidal edges1408.4243v1 · Kosuke Naokawa, Masaaki Umehara, Kotaro Yamada2014 · 34 citationsarXiv
Zero mean curvature surfaces in Lorentz-Minkowski 3-space and 2-dimensional fluid mechanics1309.2459v1 · Shoichi Fujimori, Young Wook Kim, Sung-Eun Koh et al.2013 · 26 citationsarXiv
Behavior of Gaussian curvature and mean curvature near non-degenerate singular points on wave fronts1308.2136v6 · Luciana F. Martins, Kentaro Saji, Masaaki Umehara et al.2013 · 48 citationsarXiv
Embedded triply periodic zero mean curvature surfaces of mixed type in Lorentz-Minkowski 3-space1302.4315v1 · Shoichi Fujimori, Wayne Rossman, Masaaki Umehara et al.2013 · 20 citationsarXiv
Zero mean curvature surfaces in Lorentz-Minkowski 3-space which change type across a light-like line1211.4912v3 · Shoichi Fujimori, Young Wook Kim, Sung-Eun Koh et al.2012 · 17 citationsarXiv
Intrinsic Invariants of Cross Caps1207.3853v2 · Masaru Hasegawa, Atsufumi Honda, Kosuke Naokawa et al.2012 · 32 citationsarXiv
Flat surfaces in hyperbolic 3-space whose hyperbolic Gauss maps are bounded1205.4779v1 · Francisco Martin, Masaaki Umehara, Kotaro Yamada2012 · 4 citationsarXiv
An index formula for a bundle homomorphism of the tangent bundle into a vector bundle of the same rank, and its applications1202.3854v4 · Kentaro Saji, Masaaki Umehara, Kotaro Yamada2012 · 13 citationsarXiv
Calabi-Yau Problem for Legendrian curves in C^3 and applications1107.0106v2 · Francisco Martin, Masaaki Umehara, Kotaro Yamada2011 · 0 citationsarXiv
Closed planar curves without inflections1103.3343v1 · Shuntaro Ohno, Tetsuya Ozawa, Masaaki Umehara2011 · 1 citationarXiv
The behaviour of curvature functions at cusps and inflection points1102.4478v1 · Shohei Shiba, Masaaki Umehara2011 · 0 citationsarXiv
A_2-singularities of hypersurfaces with non-negative sectional curvature in Euclidean space1011.1544v1 · Kentaro Saji, Masaaki Umehara, Kotaro Yamada2010 · 11 citationsarXiv
CMC-1 trinoids in hyperbolic 3-space and metrics of constant curvature one with conical singularities on the 2-sphere1008.3734v3 · Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu et al.2010 · 19 citationsarXiv
The duality of conformally flat manifolds1001.4569v4 · Huili Liu, Masaaki Umehara, Kotaro Yamada2010 · 14 citationsarXiv
Singularities of Blaschke normal maps of convex surfaces1001.1200v3 · Kentaro Saji, Masaaki Umehara, Kotaro Yamada2010 · 2 citationsarXiv
Coherent tangent bundles and Gauss-Bonnet formulas for wave fronts0910.3456v3 · Kentaro Saji, Masaaki Umehara, Kotaro Yamada2009 · 33 citationsarXiv
New maximal surfaces in Minkowski 3-space with arbitrary genus and their cousins in de Sitter 3-space0910.2768v1 · Shoichi Fujimori, Wayne Rossman, Masaaki Umehara et al.2009 · 27 citationsResult. Math. 56, 2009, 41-82
Applications of a completeness lemma in minimal surface theory to various classes of surfaces0909.1128v2 · Masaaki Umehara, Kotaro Yamada2009 · 19 citationsarXiv
Career total: 223 works. 71 are in this corpus.Showing the 50 most recent.
Profile built from the corpus for this byline.
Author records are still filling in while the Hub is in alpha. If this is your page, you'll be able to claim it soon. Spot a mistake? Tell us.