1 
Research paper (scientific journal)

Only

Structure of 2skeletons of higher dimensional regular polytopes

Fumiko Ohtsuka

Math. J. Ibaraki Univ.


50, 2733

2018





2 
Research paper (scientific journal)

Joint

A natural generalization of regular convex polyhedra

Jinichi Itoh and Fumiko Ohtsuka

Topology and its Applications

elsevier

219, 4354

2017





3 
Research paper (scientific journal)

Joint

Some remarks on simple closed geodesics of surfaces with ends

Jinichi Itoh, Fumiko Ohtsuka and Tudor Zamfirescu

Bull. Math. Soc. Sci. Math. Roumanie


52(100), 311319

2009





4 
Research paper (scientific journal)

Only

Erratum to: "Structure of flat piecewise Riemannian 2polyhedra"

Fumiko Ohtsuka

Math. J. Ibaraki Univ.


37, 107114

2005





5 
Research paper (scientific journal)

Joint

Total curvature of noncompact piecewise Riemannian 2polyhedra

Jinichi Itoh, Fumiko Ohtsuka

Tsukuba J. Math.


29, 471493

2005





6 
Research paper (scientific journal)

Only

Structure of flat piecewise Riemannian 2polyhedra

Fumiko Ohtsuka

Math. J. Ibaraki Univ.


36, 5764

2004





7 
Research paper (scientific journal)

Joint

Total excess on length surfaces

Yoshiroh Machigashira, Fumiko Ohtsuka

Mathematische Annalen


319, 675706

2001





8 
Research paper (scientific journal)

Joint

Total excess and Tits metric for piecewise Riemannian 2manifolds

Kazuhiro Kawamura, Fumiko Ohtsuka

Topology and its Applications


94, 173193

1999





9 
Research paper (scientific journal)

Joint

The existence of a straight line of piecewise Riemannian 2manifolds

Kazuhiro Kawamura, Fumiko Ohtsuka

Note di Matematica


18, 119130

1998





10 
Research paper (scientific journal)

Only

Hausdorff approximations on Hadamard manifolds and their ideal boundaries

Fumiko Ohtsuka

Tsukuba Journal of Mathematics


20, 425433

1996





11 
Research paper (scientific journal)

Only

Rigidity of compact ideal boundaries of manifolds joined by Hausdorff approximations

Fumiko Ohtsuka

Tsukuba Journal of Mathematics


18, 439447

1994





12 
Research paper (scientific journal)

Only

On manifolds having some restricted ideal boundaries

Fumiko Ohtsuka

Geometriae Dedicata


38, 151157

1991





13 
Research paper (scientific journal)

Joint

The Euclidean factor of a Hadamard manifold

Toshiaki Adachi, Fumiko Ohtsuka

Proceedings of the American mathematical Society


113, 209212

1991





14 
Research paper (scientific journal)

Only

On the existence of a straight line

Fumiko Ohtsuka

Tsukuba Journal of Mathematics


12, 269272

1988





15 
Research paper (scientific journal)

Only

On a relation between the total curvature and Tits metric

Fumiko Ohtsuka

Bulletin of the Faculity of Science, Ibaraki University, Series A


20, 58

1988





16 
Research paper (scientific journal)

Only

Complete 2transnormal hypersurfaces in a kaehler manifold of negative constant holomorphic sectional curvature

Fumiko Ohtsuka

Tsukuba Journal of Mathematics


11, 361366

1987





17 
Research paper (scientific journal)

Only

Compact 2transnormal hypersurface in a kaehler manifold of constant holomorphic sectional curvature

Fumiko Ohtsuka

Tsukuba Journal of Mathematics


10, 4955

1986




