Sadayoshi Kojima

教授(任期付)

  • 380 Citations
  • 10 h-Index
1979 …2019

Research output per year

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Research Output

  • 380 Citations
  • 10 h-Index
  • 31 Article
  • 1 Comment/debate
  • 1 Editorial
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Article
2019

On the moduli space of equilateral plane pentagons

Klaus, S. & Kojima, S., 2019 Sep 1, In : Beitrage zur Algebra und Geometrie. 60, 3, p. 487-497 11 p.

Research output: Contribution to journalArticle

Open Access
2018

Normalized entropy versus volume for pseudo-Anosovs

Kojima, S. & McShane, G., 2018 Apr 5, In : Geometry and Topology. 22, 4, p. 2403-2426 24 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2013

Minimal dilatations of pseudo-Anosovs generated by the magic 3-manifold and their asymptotic behavior

Kin, E., Kojima, S. & Takasawa, M., 2013 Oct 10, In : Algebraic and Geometric Topology. 13, 6, p. 3537-3602 66 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2012

Entropy, weil-petersson translation distance and gromov norm for surface automorphisms

Kojima, S., 2012 Jul 23, In : Proceedings of the American Mathematical Society. 140, 11, p. 3993-4002 10 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2010

A numerical algorithm for block-diagonal decomposition of matrix -algebras with application to semidefinite programming

Murota, K., Kanno, Y., Kojima, M. & Kojima, S., 2010 Jun 1, In : Japan Journal of Industrial and Applied Mathematics. 27, 1, p. 125-160 36 p.

Research output: Contribution to journalArticle

34 Citations (Scopus)
2009

Entropy versus volume for pseudo-anosovs

Kin, E., Kojima, S. & Takasawa, M., 2009 Jan 1, In : Experimental Mathematics. 18, 4, p. 397-407 11 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2007

On the Takagi Lectures

Kojima, S., 2007 Mar 1, In : Japanese Journal of Mathematics. 2, 1, p. 149-150 2 p.

Research output: Contribution to journalArticle

2006

Circle packings on surfaces with projective structures and uniformization

Kojima, S., Mizushima, S. & Tan, S. P., 2006 Jun 1, In : Pacific Journal of Mathematics. 225, 2, p. 287-300 14 p.

Research output: Contribution to journalArticle

2003

Circle packings on surfaces with projective structures

Kojima, S., Mizushima, S. & Tan, S. P., 2003 Jan 1, In : Journal of Differential Geometry. 63, 3, p. 349-397 49 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2002

Configuration spaces of points on the circle and hyperbolic Dehn fillings, II

Yamashita, Y., Nishi, H. & Kojima, S., 2002 Dec 1, In : Geometriae Dedicata. 89, 1, p. 143-157 15 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2001

Complex hyperbolic cone structures on the configuration spaces

Kojima, S., 2001 Jan 1, In : Rendiconti dell'Istituto di Matematica dell'Universita di Trieste. 32, p. 149-163 15 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
1999

Configuration spaces of points on the circle and hyperbolic dehn fillings

Kojima, S., Nishi, H. & Yamashita, Y., 1999 May, In : Topology. 38, 3, p. 497-516 20 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
1998

Deformations of hyperbolic 3-cone-manifolds

Kojima, S., 1998 Jan 1, In : Journal of Differential Geometry. 49, 3, p. 469-516 48 p.

Research output: Contribution to journalArticle

47 Citations (Scopus)

Hyperbolic 3-manifolds singular along knots

Kojima, S., 1998 Jan 1, In : Chaos, solitons and fractals. 9, 4-5, p. 765-777 13 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)
1997

Flexible boundaries in deformations of hyperbolic 3-manifolds

Fujii, M. & Kojima, S., 1997 Sep 1, In : Osaka Journal of Mathematics. 34, 3, p. 541-551 11 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
1996

Compact hyperbolic universe and singularities

Ishibashi, A., Koike, T., Siino, M. & Kojima, S., 1996 Jan 1, In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 54, 12, p. 7303-7310 8 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
1994

Geometry of hyperbolic 3-manifolds with boundary

Kojima, S., 1994 Jan 1, In : Kodai Mathematical Journal. 17, 3, p. 530-537 8 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
1993

Shapes of stars

Kojima, S., 1993 Mar, In : Proceedings of the American Mathematical Society. 117, 3, p. 845-851 7 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)
1992

Apollonian packings and hyperbolic geometry

Ishida, M. & Kojima, S., 1992 Sep 1, In : Geometriae Dedicata. 43, 3, p. 265-283 19 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Homotopy invariants of nonorientable 4-manifolds

Kim, M. H., Kojima, S. & Raymond, F., 1992 Jan 1, In : Transactions of the American Mathematical Society. 333, 1, p. 71-81 11 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
1991

The smallest hyperbolic 3-manifolds with totally geodesic boundary

Kojima, S. & Miyamoto, Y., 1991 Jan 1, In : Journal of Differential Geometry. 34, 1, p. 175-192 18 p.

Research output: Contribution to journalArticle

32 Citations (Scopus)
1988

Isometry transformations of hyperbolic 3-manifolds

Kojima, S., 1988 Aug, In : Topology and its Applications. 29, 3, p. 297-307 11 p.

Research output: Contribution to journalArticle

48 Citations (Scopus)
1987
16 Citations (Scopus)
1984

A construction of geometric structures on Seifert fibered spaces

Kojima, S., 1984 Jan 1, In : Journal of the Mathematical Society of Japan. 36, 3, p. 483-495 13 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Bounding Finite Groups Acting on 3-Manifolds

Kojima, S., 1984 Jan 1, In : Mathematical Proceedings of the Cambridge Philosophical Society. 96, 2, p. 269-281 13 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)
1983

Milnor's μ-invariants, Massey products and Whitney's trick in 4 dimensions

Kojima, S., 1983 Jul, In : Topology and its Applications. 16, 1, p. 43-60 18 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Nilpotent completions and Lie rings associated to link groups

Kojima, S., 1983 Dec 1, In : Commentarii Mathematici Helvetici. 58, 1, p. 115-134 20 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
1980

Algebraic classification of linking pairings on 3-manifolds

Kawauchi, A. & Kojima, S., 1980 Feb 1, In : Mathematische Annalen. 253, 1, p. 29-42 14 p.

Research output: Contribution to journalArticle

52 Citations (Scopus)
1979

Classification of simple knots by Levine pairings

Kojima, S., 1979 Dec 1, In : Commentarii Mathematici Helvetici. 54, 1, p. 356-367 12 p.

Research output: Contribution to journalArticle

18 Citations (Scopus)

Some new invariants of links

Kojima, S. & Yamasaki, M., 1979 Oct 1, In : Inventiones Mathematicae. 54, 3, p. 213-228 16 p.

Research output: Contribution to journalArticle

28 Citations (Scopus)

The matsumoto tripling for compact simply connected 4-manifolds

Kato, M., Kojima, S., Ohkawa, T. & Yamasaki, M., 1979 Dec, In : Tohoku Mathematical Journal. 31, 4, p. 525-535 11 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)