Masafumi Okumura

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All published works

Action	Title	Year	Authors
+	Certain submanifolds of complex space forms	2020	Mirjana Djorić Masafumi Okumura
+	Normal curvature of CR submanifolds of maximal CR dimension of the complex projective space	2018	Mirjana Djorić Masafumi Okumura
+	Certain submanifolds of real codimension two of a complex projective space	2015	Mirjana Djorić Masafumi Okumura
+	Real submanifolds of codimension two of a complex space form	2012	Mirjana Djorić Masafumi Okumura
+	Certain condition on the second fundamental form of CR submanifolds of maximal CR dimension of complex hyperbolic space	2010	Mirjana Djorić Masafumi Okumura
+	Invariant Submanifolds of Real Hypersurfaces of Complex Manifolds	2010	Mirjana Djorić Masafumi Okumura
+	CR Submanifolds of Complex Projective Space	2009	Mirjana Djorić Masafumi Okumura
+	Eigenvalues of the shape operator A of CR submanifolds of maximal CR dimension of a complex space form	2009	Mirjana Djorić Masafumi Okumura
+	Contact CR submanifolds of maximal CR dimension	2009	Mirjana Djorić Masafumi Okumura
+	CR submanifolds of maximal CR dimension	2009	Mirjana Djorić Masafumi Okumura
+	Real hypersurfaces of a complex projective space	2009	Mirjana Djorić Masafumi Okumura
+	The principal circle bundle S2n+1(Pn(C), S1)	2009	Mirjana Djorić Masafumi Okumura
+	Codimension reduction of a submanifold	2009	Mirjana Djorić Masafumi Okumura
+	The Levi form	2009	Mirjana Djorić Masafumi Okumura
+	CR submanifolds of maximal CR dimension satisfying the condition h(FX, Y) + h(X, FY) = 0	2009	Mirjana Djorić Masafumi Okumura
+	Almost complex structure	2009	Mirjana Djorić Masafumi Okumura
+	Hypersurfaces of a Riemannian manifold of constant curvature	2009	Mirjana Djorić Masafumi Okumura
+	Submersion and immersion	2009	Mirjana Djorić Masafumi Okumura
+	Complex vector spaces, complexification	2009	Mirjana Djorić Masafumi Okumura
+	Levi form of CR submanifolds of maximal CR dimension of a complex space form	2009	Mirjana Djorić Masafumi Okumura
+	Invariant submanifolds of real hypersurfaces of complex space forms	2009	Mirjana Djorić Masafumi Okumura
+	Tubes over submanifolds	2009	Mirjana Djorić Masafumi Okumura
+	Hypersurfaces of a sphere with parallel shape operator	2009	Mirjana Djorić Masafumi Okumura
+	Structure equations of a submanifold	2009	Mirjana Djorić Masafumi Okumura
+	The scalar curvature of CR submanifolds of maximal CR dimension	2009	Mirjana Djorić Masafumi Okumura
+	Submanifolds of a complex manifold	2009	Mirjana Djorić Masafumi Okumura
+	Complex manifolds	2009	Mirjana Djorić Masafumi Okumura
+	Submanifolds of a Euclidean space	2009	Mirjana Djorić Masafumi Okumura
+	Hypersurfaces of a sphere	2009	Mirjana Djorić Masafumi Okumura
+	Certain condition on the second fundamental form of CR submanifolds of maximal CR dimension of complex projective space	2008	Mirjana Djorić Masafumi Okumura
+	The scalar curvature of CR submanifolds of maximal CR dimension of complex projective space	2008	Mirjana Djorić Masafumi Okumura
+	Certain CR submanifolds of maximal CR dimension of complex space forms	2008	Mirjana Djorić Masafumi Okumura
+	Certain condition on the second fundamental form of CR submanifolds of maximal CR dimension of complex Euclidean space	2006	Mirjana Djorić Masafumi Okumura
+	CR SUBMANIFOLDS OF MAXIMAL CR DIMENSION IN COMPLEX SPACE FORMS AND SECOND FUNDAMENTAL FORM	2004	Mirjana Djorić Masafumi Okumura
+	Levi Form of CR Submanifolds of Maximal CR Dimension of Complex Space forms	2004	Mirjana Djorić Masafumi Okumura
+ PDF Chat	A function defined on an even-dimensional real submanifold of a Hermitian manifold	2003	Masafumi Okumura
+ PDF Chat	CR submanifolds of maximal CR dimension in complex manifolds	2002	Mirjana Djorić Masafumi Okumura
+	On Contact Submanifolds in Complex Projective Spaces	1999	Mirjana Djorić Masafumi Okumura
+	CR submanifolds of maximal CR dimension of complex projective space	1998	Mirjana Djori Masafumi Okumura
+	Scalar curvature of a certain CR-submanifold of complex projective space	1997	Yeong-Wu Choe Masafumi Okumura
+	n-Dimensional real submanifolds with (n−1)-dimensional maximal holomorphic tangent subspace in complex projective spaces	1994	Masafumi Okumura L. Vanhecke
+	A congruence theorem for hypersurfaces of Riemannian manifolds	1990	A. J. Ledger Masafumi Okumura
+	Non-immersibility of a space form as a totally umbilical hypersurface	1988	Masafumi Okumura Hiroshi Takahashi
+	Scalar curvature and real submanifolds of codimension 2 of a complex projective space	1986	Masafumi Okumura
+	Reducing the codimension of a submanifold of a complex projective space	1982	Masafumi Okumura
+	The scalar curvature of a real hypersurface of a complex projective space	1981	Masafumi Okumura
+	Normal curvature and real submanifold of the complex projective space	1978	Masafumi Okumura
+ PDF Chat	Submanifolds with<i>L</i>-flat normal connection of the complex projective space	1978	Masafumi Okumura
+ PDF Chat	Compact real hypersurfaces with constant mean curvature as a complex projective space	1978	Masafumi Okumura
+ PDF Chat	Infinitesimal variations of invariant submanifolds of a Kaehlerian manifold	1978	Kentaro Yano U-Hang Ki Masafumi Okumura
+	Anti-invariant submanifolds of almost contact metric manifolds	1977	Gerald D. Ludden Masafumi Okumura Kentarô Yano
+ PDF Chat	Compact real hypersurfaces of a complex projective space	1977	Masafumi Okumura
+ PDF Chat	Conformally flat manifolds and a pinching problem on the Ricci tensor	1976	Samuel I. Goldberg Masafumi Okumura
+ PDF Chat	A totally real surface in 𝐶𝑃² that is not totally geodesic	1975	Gerald D. Ludden Masafumi Okumura Kentarô Yano
+ PDF Chat	On some real hypersurfaces of a complex projective space	1975	Masafumi Okumura
+	A Characterization of <i>S</i> <sup> <i>n</i> −1</sup> × <i>S</i> <sup>1</sup> BY DIFFERENTIAL EQUATIONS	1974	David E. Blair Masafumi Okumura
+	Some integral formulas and their applications to hypersurfaces of $S^n \times S^n$	1974	Gerald D. Ludden Masafumi Okumura
+	Hypersurfaces and a Pinching Problem on the Second Fundamental Tensor	1974	Masafumi Okumura
+ PDF Chat	Scalar curvature, inequality and submanifold	1973	Bang‐Yen Chen Masafumi Okumura
+ PDF Chat	Hypersurface of an even-dimensional sphere satisfying a certain commutative condition	1973	David E. Blair Gerald D. Ludden Masafumi Okumura
+ PDF Chat	Hypersurfaces of $S\sp{2n+1}(k)$ in $E\sp{2n+2}$	1973	Masafumi Okumura
+ PDF Chat	Submanifolds and a pinching problem on the second fundamental tensors	1973	Masafumi Okumura
+ PDF Chat	A pinching problem on the second fundamental tensors and submanifolds of a sphere	1973	Masafumi Okumura
+	Invariant submanifolds of a manifold with $(f,\,g,\,u,\,v,\,łambda)$-structure	1972	Kentaro Yano Masafumi Okumura
+ PDF Chat	On normal $(f,\,g,\,u,\,v,\, \lambda)$-structures on submanifolds of codimension $2$ in an even-dimensional Euclidean space	1971	Kentaro Yano Masafumi Okumura
+ PDF Chat	Invariant hypersurfaces of a manifold with $(f,\,g,\,u,\,v,\,łambda)$-structure	1971	Kentaro Yano Masafumi Okumura
+ PDF Chat	Contact Riemannian submanifolds	1970	Masafumi Okumura
+ PDF Chat	Submanifolds of codimension 2 with certain properties	1970	Masafumi Okumura
+ PDF Chat	On $(F,\,g,\,u,\,v,\,łambda)$-structures	1970	Kentaro Yano Masafumi Okumura
+ PDF Chat	Integral formulas for submanifolds of codimension $2$ and their applications	1969	Kentarô Yano Masafumi Okumura
+ PDF Chat	Compact orientable submanifold of codimension $2$ in an odd dimensional sphere	1968	Masafumi Okumura
+ PDF Chat	Totally umbilical submanifolds of a Kaehlerian manifold	1967	Masafumi Okumura
+ PDF Chat	On cocomplex structures	1967	Koichi Ogiue Masafumi Okumura
+ PDF Chat	Totally umbilical hypersurfaces of a locally product Riemannian manifold	1967	Masafumi Okumura
+ PDF Chat	Certain hypersurfaces of an odd dimensional sphere	1967	Masafumi Okumura
+ PDF Chat	Certain infinitesimal transformation of normal contact metric manifold	1966	Masafumi Okumura
+ PDF Chat	Contact hypersurfaces in certain Kaehlerian manifolds	1966	Masafumi Okumura
+ PDF Chat	Cosymplectic hypersurfaces in Kaehlerian manifold of constant holomorphic sectional curvature	1965	Masafumi Okumura
+ PDF Chat	Certain almost contact hypersurfaces in Kaehlerian manifolds of constant holomorphic sectional curvatures	1964	Masafumi Okumura
+ PDF Chat	Certain almost contact hypersurfaces in Euclidean spaces	1964	Masafumi Okumura
+	Some remarks on space with a certain contact structure	1962	Masafumi Okumura
+ PDF Chat	On the almost-complex structure of tangent bundles of Riemannian spaces	1962	Shun-ichi Tachibana Masafumi Okumura
+ PDF Chat	On infinitesimal conformal and projective transformations of normal contact spaces	1962	Masafumi Okumura

Common Coauthors

Coauthor	Papers Together
Mirjana Djorić	37
Kentaro Yano	5
Gerald D. Ludden	4
Kentarô Yano	3
David E. Blair	2
Koichi Ogiue	1
Lieven Vanhecke	1
U-Hang Ki	1
Mirjana Djori	1
Samuel I. Goldberg	1
Hiroshi Takahashi	1
Yeong-Wu Choe	1
Shun-ichi Tachibana	1
Bang‐Yen Chen	1
A. J. Ledger	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+ PDF Chat	Rigidity theorems in rank-1 symmetric spaces	1970	H. Blaine Lawson	18
+	On differentiable manifolds with contact metric structures	1962	Shinya Sasaki Yoji Hatakeyama	13
+ PDF Chat	On some real hypersurfaces of a complex projective space	1975	Masafumi Okumura	12
+ PDF Chat	Approximation theorems on differentiable submanifolds of a complex manifold	1969	Ricardo Nirenberg Raymond O. Wells	12
+ PDF Chat	Focal sets and real hypersurfaces in complex projective space	1982	Thomas E. Cecil Patrick J. Ryan	11
+ PDF Chat	On Fubinian and $C$-Fubinian manifolds	1963	Yoshihiro Tashiro Shun-ichi Tachibana	11
+ PDF Chat	On differentiable manifolds with certain structures which are closely related to almost contact structure, I	1960	Shigeo Sasaki	10
+ PDF Chat	On contact structure of hypersurfaces in complex manifolds, II	1963	Yoshihiro Tashiro	10
+ PDF Chat	Reduction of the codimension of an isometric immersion	1971	Joseph Erbacher	10
+	The Geometry of CR-Manifolds	1989	Alexander Tumanov	9
+ PDF Chat	Certain almost contact hypersurfaces in Euclidean spaces	1964	Masafumi Okumura	8
+ PDF Chat	On contact structure of hypersurfaces in complex manifolds, I	1963	Yoshihiro Tashiro	8
+	CR submanifolds of maximal CR dimension of complex projective space	1998	Mirjana Djori Masafumi Okumura	7
+ PDF Chat	Homogeneity and some curvature conditions for hypersurfaces	1969	Patrick J. Ryan	7
+	Foundations of Differential Geometry	1963	Shôshichi Kobayashi Katsumi Nomizu	7
+	On some real hypersurfaces of a complex hyperbolic space	1986	Sebastián Montiel Alfonso Romero	6
+ PDF Chat	Certain conditions for a Riemannian manifold to be isometric with a sphere	1962	Morio Obata	6
+ PDF Chat	Contact Manifolds in Riemannian Geometry	1976	David E. Blair	6
+	Real Hypersurfaces in Complex Space Forms	2015	Thomas E. Cecil Patrick J. Ryan	5
+	CR SUBMANIFOLDS OF MAXIMAL CR DIMENSION IN COMPLEX SPACE FORMS AND SECOND FUNDAMENTAL FORM	2004	Mirjana Djorić Masafumi Okumura	5
+	Minimal Submanifolds of a Sphere with Second Fundamental Form of Constant Length	2012	Shiing-Shen Chern Manfredo do Carmo Shimpei Kobayashi	5
+ PDF Chat	CR submanifolds of maximal CR dimension in complex manifolds	2002	Mirjana Djorić Masafumi Okumura	5
+	Minimal Submanifolds of a Sphere with Second Fundamental Form of Constant Length	1970	Shiing-Shen Chern Manfredo do Carmo Shimpei Kobayashi	5
+ PDF Chat	Real hypersurfaces in a complex projective space with constant principal curvatures	1975	Ryoichi Takagi	5
+ PDF Chat	Certain hypersurfaces of an odd dimensional sphere	1967	Masafumi Okumura	5
+ PDF Chat	Pseudo-Einstein real hypersurfaces in complex space forms	1979	Masahiro Kon	5
+ PDF Chat	𝐶𝑅 submanifolds of a Kaehler manifold. I	1978	Aurel Bejancu	5
+	The theory of Lie derivatives and its applications	1957	Kentaro Yano	4
+ PDF Chat	Contact hypersurfaces in certain Kaehlerian manifolds	1966	Masafumi Okumura	4
+	Minimal Varieties in Riemannian Manifolds	1968	James Simons	4
+ PDF Chat	On $(F,\,g,\,u,\,v,\,łambda)$-structures	1970	Kentaro Yano Masafumi Okumura	4
+ PDF Chat	On hypersurfaces in Sasakian manifolds	1969	Seiichi Yamaguchi	4
+ PDF Chat	Induced structures on submanifolds	1970	David E. Blair Gerald D. Ludden Kentaro Yano	4
+	On Contact Submanifolds in Complex Projective Spaces	1999	Mirjana Djorić Masafumi Okumura	4
+	Geometry of submanifolds	1973	Bang‐Yen Chen	4
+ PDF Chat	On differentiable manifolds with certain structures which are closely related to almost contact structure, II	1961	Shigeo Sasaki Yoji Hatakeyama	4
+	CR Submanifolds of Complex Projective Space	2009	Mirjana Djorić Masafumi Okumura	4
+ PDF Chat	On normal $(f,\,g,\,u,\,v,\, \lambda)$-structures on submanifolds of codimension $2$ in an even-dimensional Euclidean space	1971	Kentaro Yano Masafumi Okumura	4
+ PDF Chat	On the existence of Riemann metrics associated with a $2$-form of rank $2r$	1962	Yoji Hatakeyama	4
+	On invariant subspaces in the almost complex X2n	1955	J. A. Schouten Kentaro Yano	4
+ PDF Chat	Totally umbilical submanifolds of a Kaehlerian manifold	1967	Masafumi Okumura	4
+ PDF Chat	A formula of Simons' type and hypersurfaces with constant mean curvature	1969	Katsumi Nomizu Brian Smyth	3
+ PDF Chat	Fibred spaces with invariant Riemannian metric	1967	Kentaro Yano Shigeru Ishihara	3
+ PDF Chat	Contact hypersurfaces of a complex hyperbolic space	1987	Micheal H. Vernon	3
+	Hypersurfaces and a Pinching Problem on the Second Fundamental Tensor	1974	Masafumi Okumura	3
+	Normal curvature and real submanifold of the complex projective space	1978	Masafumi Okumura	3
+ PDF Chat	Real hypersurfaces and complex submanifolds in complex projective space	1986	Makoto Kimura	3
+	Differential Geometry on Complex and Almost Complex Spaces.	1967	A. L. Hilt Kentaro Yano	3
+ PDF Chat	On real hypersurfaces of a complex projective space	1976	Yoshiaki Maeda	3
+	Sectional curvatures of holomorphic planes on a real hypersurface inP n (C)	1987	Makoto Kimura	3