論文

• Eiko Kin, Sadayoshi Kojima, Mitsuhiko Takasawa. Minimal dilatation of pseudo-Anosovs generated by the magic 3-manifold and their asymptotic behavior, Algebraic and Geometric Topology, Vol. 13, pp. 3537-3602, 2013.
• Sadayoshi Kojima. Entropy, Weil-Petersson translation distance and Gromov norm for surface automorphisms, Proceedings of American Mathematical Society, Vol. 140, pp. 3993-4002, 2012.
• Kazuo Murota, Yoshihiro Kanno, MASAKAZU KOJIMA, SADAYOSHI KOJIMA. A numerical algorithm for block-diagonal decomposition of matrix *-algebras, Part I: proposed approach and application to semidefinite programming, Japan Journal of Industrial and Applied Mathematics, Vol. 27, pp. 125-160, Oct. 2010.
• Kazuo Murota, Yoshio Kanno, Masakazu Kojima, Sadayoshi Kojima. A numerical algorithm for block-diagonal decomposition of matrix *-algebra, Japan Journal of Industrial and Applied Mathematics, 2010.
• Eiko Kin, Sadayoshi Kojima, Mitsuhiko Takasawa. Entropy versus volume for pseudo-Anosovs, Experimental Mathematics, Vol. 18, No. 4, pp. 397-407, 2009.
• Sadayoshi Kojima, Shigeru Mizushima, Ser Peow Tan. Circle packings on surfaces with projective structures and uniformization, Pacific J. Math., Vol. 226, pp. 287-300, 2006.
• Sadayoshi Kojima, Shigeru Mizushima, Ser Peow Tan. Circle packings on surfaces with projective structures, J. Differential Geometry, Vol. 63, pp. 349-397, 2003.
• Y. Yamashita, H. Nishi, S. Kojima. Configuration spaces of points on the circle and hyperbolic Dehn fillings, II, Geometriae Dedicata, Vol. 89, pp. 143-157, 2002.
• SADAYOSHI KOJIMA. Complex hyperbolic cone structures on the configuration spaces, Rend. Istit. Mat.. Univ. Trieste, Vol. 32, pp. 149-163, 2001.
• S. Kojima, H. Nishi, Y. Yamahsita. Configuration spaces of points on the circle and hyperbolic Dehn fillings, Topology, Vol. 38, pp. 496-516, 1999.
• SADAYOSHI KOJIMA. Deformations of hyperbolic 3-cone-manifolds, Journal of Differential Geometry, Vol. 49, pp. 469-516, 1998.
• M. Fujii, S. Kojima. Flexible boundaries in deformations of hyperbolic 3-manifolds, Osaka Journal of Mathematics, Vol. 34, pp. 541-551, 1997.
• A. Ishibashi, T. Koike, M. Shiino, S. Kojima. Compact hyperbolic universe and singularities, Physical Review D, Vol. 54, pp. 7303-7310, 1996.
• SADAYOSHI KOJIMA. Immersed Geodesic Surfaces in Hyperbolic 3-Manifolds, Complex Variables, Vol. 29, pp. 45-58, 1996.
• S.Kojima, Y. Yamashita. Shapes of Stars, Proceedings of American Mathematical Society, Vol. 117, pp. 845-851, 1993.
• SADAYOSHI KOJIMA. Polyhedral decomposition of hyperbolic 3-manifolds with totally geodesic boundary, Advanced Study in Pure Math., Vol. 20, pp. 93-112, 1992.
• S. Kojima, M. Ishida. Apollonian Packings and hyperbolic geometry, Geometriae Dedicata, Vol. 43, pp. 265-283, 1992.
• M. Ho Kim, S. Kojima, F. Raymond. Homotopy invariants of nonorientable 4-manifolds, Transactions of American Mathematical Society, Vol. 333, pp. 71-81, 1992.
• S. Kojima, Y. Miyamoto. The smallest hyperbolic 3-manifolds with totally geodesic boundary, Journal of Differential Geometry, Vol. 34, pp. 175-192, 1991.
• SADAYOSHI KOJIMA. Polyhedral decomposition of hyperbolic manifolds with boundary, Proceedings of workshop in Pure Mathematics, Seoul N. Univ., Vol. 10, No. part iii, pp. 37-57, 1990.
• SADAYOSHI KOJIMA. Isometry transformations of hyperbolic 3-manifolds, Topology and its applications, Vol. 29, pp. 297-307, 1988.
• D. D. Long, S. Kojima. Virtual Betti numbers of some hyperbolic 3-manifolds, A Fate of Topology, Acadmic Press, pp. 417-437, 1988.
• SADAYOSHI KOJIMA. Finite covers of 3-manifolds containing essential surfaces of Euler characteristic = 0, Proceedings of American Mathematical Society, Vol. 101, pp. 743-747, 1987.
• SADAYOSHI KOJIMA. Bounding finite groups acting on 3-manifolds, Mathematical Proceedings Cambridge Philosophical Society, Vol. 96, pp. 269-281, 1984.
• SADAYOSHI KOJIMA. A construction of geometric structures on Seifert fibered spaces, Journal of Mathematical Society of Japan, Vol. 36, pp. 483-495, 1984.
• SADAYOSHI KOJIMA. Milnor'S \mu-invariants, Massey products and Whitney's trick in 4 dimensions, Topology and its applications, Vol. 16, pp. 43-60, 1983.
• SADAYOSHI KOJIMA. Nilpotent completions and Lie rings associated to link groups, Commentarii Mathematici Helvetici, Vol. 58, pp. 115-134, 1983.
• A. Kawauchi, S. Kojima. Algebraic classification of linking pairings on 3-manifolds, Math. Ann., Vol. 253, pp. 29-42, 1980.
• S. Kojima, M. Yamasaki. Some new invariants of links, Inventiones math., Vol. 54, pp. 213-228, 1979.
• M. Kato, S. Kojima, T. Ohkawa, M. Yamasaki. The Matsumoto tripling for compact simply connected 4-manifolds, Tohoku Math. J., Vol. 31, pp. 525-535, 1979.
• SADAYOSHI KOJIMA. Piecewise linear Dehn's lemma in 4-dimensions, Proceedings of Japan Academy, Vol. 55, pp. 65-67, 1979.
• SADAYOSHI KOJIMA. Classification of simple knots by Levine pairings, Comment. Math. Helvetici, Vol. 54, pp. 356-367, 1979.
• SADAYOSHI KOJIMA. A classification of some even dimensional fibered knots, J. Fac. Sci. Univ. Tokyo, Vol. 24, pp. 671-683, 1977.

著書

• 小島定吉. 離散構造, 2013.
• Sadayoshi Kojima. Circle packing and Teichmuller space, Handbook of Teichmuller theory, Volume II, European Mathematical Society Publishing House, Mar. 2009.
• 小島定吉. 3次元の幾何学, 朝倉書店, 朝倉書店, 2002.
• 小島定吉. 多角形の現代幾何学 増補版, 牧野書店, 牧野書店, 1999.
• 小島定吉. トポロジー入門, 共立出版株式会社, 共立出版株式会社, 1998.

国際会議発表 (査読なし・不明)

• Sadayoshi Kojima. The moduli space of pentagons, NII Shonan Meeting, Knot theory: Algorithms, complexity and computation, Apr. 2014.
• Sadayoshi Kojima. Normalized entropy versus volume for pseudo-Anosovs, Analysis and Geometry of Riemann Surfaces and Related Topics, June 2012.
• SADAYOSHI KOJIMA. Entropy versus volume for surface automorphisms, KIAS Workshop on Hyperbolic Geometry, Sept. 2010.
• SADAYOSHI KOJIMA. Entropy versus simplicial volume for surface automorphisms, Geometry, Topology and Dynamics of Character Varieties, June 2010.
• Sadayoshi Kojima. Entropy vs volume, KIAS Workshop on Hyperbolic Geometry and Related Topics, Dec. 2008.
• Kazuo Murota, Yoshihiro Kanno, Masakazu Kojima, Sadayoshi Kojima. A numerical algorithm for block-diagonal decomposition of matrix *-algebra, HPOPT 2008, June 2008.
• Sadayoshi Kojima. Comparison of hyperbolic volume with other invariants, Workshop on hyperbolic structures on 3-manifolds and large scale geometry of Teichmuller space, July 2007.
• Sadayoshi Kojima. Packings on projective Riemann surfaces, Teichmuller spaces (Classical and Quantum), June 2006.
• Sadayoshi Kojima, Shigeru Mizushima. Packings on surfaces I, ISM Symposium, Packing and Random Packing, Mar. 2006.
• Sadayoshi Kojima, Shigeru Mizushima. The Dehn filling space of a certain hyperbolic 3-orbifold, Discrete Geometric Analysis, Contemporary Mathematics, Vol. 347, pp. 131-140, 2004.
• Sadayoshi Kojima. Nonsingular parts of hyperbolic 3-cone-manifolds, Topology and Teichm\"uller Spaces, Topology and Teichim\"uller spaces, WSP, Singapore, pp. 115-122, 1996.
• SADAYOSHI KOJIMA. Determining knots by branched covers, Low-dimensional Topology and Kleinian Groups, LMS Lecture Note Series, Vol. 112, pp. 193-207, 1986.

国内会議発表 (査読なし・不明)

• SADAYOSHI KOJIMA. Normalized entropy versus volume for pseudo-Anosovs, CREST暗号数理ミニワークショップ, Sept. 2015.
• SADAYOSHI KOJIMA. Normalized entropy versus volume for pseudo-Anosovs, 第６２回トポロジーシンポジウム, Aug. 2015.
• SADAYOSHI KOJIMA. The moduli space of pentagons, CREST暗号数理キックオフミーティング, Jan. 2015.
• Sadayoshi Kojima. Normalized entropy versus volume for pseudo-Anosovs, 幾何学コロキウム, Dec. 2013.
• 小島定吉. トポロジーと基本群, 玉城嘉十郎教授記念公開学術講演会, Nov. 2013.
• SADAYOSHI KOJIMA. Normalized entropy versus volume for pseudo-Anosovs, 低次元多様体の基本群とその表現に関する様々な構造について, Oct. 2013.
• 小島定吉. ポアンカレ予想の解決, 同友クラブ「師を囲む」, May 2012.
• 小島 定吉. エントロピー vs 体積 I, II, 仙台シンポジウム W1, Aug. 2011.
• SADAYOSHI KOJIMA. Entropy versus Voliume, I, II, 第5回札幌・福岡幾何学セミナー, Feb. 2011.
• 小島定吉. ３次元トポロジーは．．．, 日本数学会秋期総合分科会, Sept. 2010.
• SADAYOSHI KOJIMA. Entropy versus simplicial volume for surface automorphisms, リーマン面に関する位相幾何学, Sept. 2010.
• 小島定吉. パリコレでポアンカレ予想を, 理学部特別講演会, Apr. 2010.
• SADAYOSHI KOJIMA. Entropy versus Volume, Branched coverings, degenerations and related topics, Mar. 2010.
• 小島定吉. 円周上の曲面束の幾何とトポロジー, 京都大学数学教室談話会, Jan. 2010.
• SADAYOSHI KOJIMA. History of Topology and Computer, Category theory, computer science and topology, Oct. 2009.
• Eiko Kin, Sadayoshi Kojima, Mitsuhiko Takasawa. Thurston polytopes and entropy functions of Dehn fillings on the magic 3-manifold, Simplicial Complexes Arising in Low-Dimensional Topology, July 2009.
• 小島定吉. ポアンカレ予想と幾何化予想 ートポロジーの１００年ー, 奈良女子大学数物情交流シンポジウム, Dec. 2008.
• 小島定吉. ポアンカレ予想について, 静岡大学理学講演会, Dec. 2008.
• 小島定吉. ポアンカレ予想と幾何化予想ートポロジーの１００年ー, 奈良女子大学数物情交流シンポジウム, Dec. 2008.
• 小島定吉. ポアンカレ予想と幾何化予想, 数理物理2008「リッチフローの微分幾何と位相幾何」, Sept. 2008.
• 小島定吉. ポアンカレ予想について, 日本応用数理学会春の研究部会総合発表会, Mar. 2008.
• Sadayoshi Kojima. Quasi-isometry of invariants, 研究集会「低次元トポロジーと幾何学」, Dec. 2006.

その他の論文・著書など

• Sadayoshi Kojima, Shigeru Mizushima, Ser Peow Tan. Circle packings on surfaces with projective structures : A survey, Spaces of Kleinian Groups and Hyperbolic 3-Manifolds, LMS Lecture Notes Series, Vol. 329, pp. 337-353, 2006.
• SADAYOSHI KOJIMA. Hyperbolic 3-manifolds singular along knots, Chaos, Solitors and Fractals, Vol. 9, pp. 765-777, 1998.
• SADAYOSHI KOJIMA. Geometry of hyperbolic 3-manifolds with boundary, Kodai Mathematical Journal, Vol. 17, No. 3, pp. 530-537, 1994.

学位論文

• Massey Products, Nilpotent Completions and their Applications to 4-dimensional Topology,  Thesis,  Ph.D,  Columbia University,  1981/05/06, 
• ,  Master of Science,  東京大学,  1978/--/--, 

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