Sadayoshi Kojima

860 total citations
43 papers, 437 citations indexed

About

Sadayoshi Kojima is a scholar working on Geometry and Topology, Mathematical Physics and Discrete Mathematics and Combinatorics. According to data from OpenAlex, Sadayoshi Kojima has authored 43 papers receiving a total of 437 indexed citations (citations by other indexed papers that have themselves been cited), including 39 papers in Geometry and Topology, 27 papers in Mathematical Physics and 15 papers in Discrete Mathematics and Combinatorics. Recurrent topics in Sadayoshi Kojima's work include Geometric and Algebraic Topology (36 papers), Mathematical Dynamics and Fractals (15 papers) and Advanced Combinatorial Mathematics (13 papers). Sadayoshi Kojima is often cited by papers focused on Geometric and Algebraic Topology (36 papers), Mathematical Dynamics and Fractals (15 papers) and Advanced Combinatorial Mathematics (13 papers). Sadayoshi Kojima collaborates with scholars based in Japan, United States and Singapore. Sadayoshi Kojima's co-authors include Akio Kawauchi, Masayuki Yamasaki, Masakazu Kojima, Yoshihiro Kanno, Kazuo Murota, Myung Ho Kim, Frank Raymond, Shinji Hara, Greg McShane and Itaru Tamura and has published in prestigious journals such as Transactions of the American Mathematical Society, Inventiones mathematicae and Chaos Solitons & Fractals.

In The Last Decade

Sadayoshi Kojima

41 papers receiving 366 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Sadayoshi Kojima Japan 12 364 271 91 84 72 43 437
Allan L. Edmonds United States 18 601 1.7× 417 1.5× 153 1.7× 114 1.4× 90 1.3× 51 707
Linda Keen United States 15 437 1.2× 386 1.4× 84 0.9× 225 2.7× 49 0.7× 42 616
Andrew H. Wallace United Kingdom 8 236 0.6× 168 0.6× 44 0.5× 46 0.5× 76 1.1× 18 361
David Mond United Kingdom 14 422 1.2× 277 1.0× 63 0.7× 96 1.1× 85 1.2× 37 562
Albert Marden United States 15 703 1.9× 462 1.7× 67 0.7× 410 4.9× 71 1.0× 46 835
Elmer Rees United Kingdom 12 295 0.8× 190 0.7× 49 0.5× 73 0.9× 102 1.4× 55 466
François Laudenbach France 10 395 1.1× 318 1.2× 67 0.7× 88 1.0× 82 1.1× 44 476
S. Gitler Mexico 13 367 1.0× 343 1.3× 130 1.4× 61 0.7× 80 1.1× 40 518
Ulrich Brehm Germany 11 179 0.5× 75 0.3× 151 1.7× 60 0.7× 88 1.2× 38 320

Countries citing papers authored by Sadayoshi Kojima

Since Specialization
Citations

This map shows the geographic impact of Sadayoshi Kojima's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Sadayoshi Kojima with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Sadayoshi Kojima more than expected).

Fields of papers citing papers by Sadayoshi Kojima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sadayoshi Kojima. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Sadayoshi Kojima. The network helps show where Sadayoshi Kojima may publish in the future.

Co-authorship network of co-authors of Sadayoshi Kojima

This figure shows the co-authorship network connecting the top 25 collaborators of Sadayoshi Kojima. A scholar is included among the top collaborators of Sadayoshi Kojima based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Sadayoshi Kojima. Sadayoshi Kojima is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kojima, Sadayoshi, et al.. (2018). On the moduli space of equilateral plane pentagons. Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry. 60(3). 487–497.
2.
Kojima, Sadayoshi & Greg McShane. (2018). Normalized entropy versus volume for pseudo-Anosovs. Geometry & Topology. 22(4). 2403–2426. 5 indexed citations
3.
Kojima, Sadayoshi, et al.. (2013). Minimal dilatations of pseudo-Anosovs generated by the magic 3–manifold and their asymptotic behavior. Algebraic & Geometric Topology. 13(6). 3537–3602. 4 indexed citations
4.
Murota, Kazuo, Yoshihiro Kanno, Masakazu Kojima, & Sadayoshi Kojima. (2010). A numerical algorithm for block-diagonal decomposition of matrix $${*}$$ -algebras with application to semidefinite programming. Japan Journal of Industrial and Applied Mathematics. 27(1). 125–160. 44 indexed citations
5.
Kojima, Sadayoshi, et al.. (2003). Circle Packings on Surfaces with Projective Structures. Journal of Differential Geometry. 63(3). 5 indexed citations
6.
Kojima, Sadayoshi, et al.. (2002). Configuration Spaces of Points on the Circle and Hyperbolic Dehn Fillings, II (Dedicated to Professor Mitsuyoshi Kato on his 60th birthday)/atl>. arXiv (Cornell University). 89(1). 141–154. 1 indexed citations
7.
Kojima, Sadayoshi, et al.. (1999). CONFIGURATION SPACES OF POINTS ON THE CIRCLE AND HYPERBOLIC DEHN FILLINGS. Topology. 38(3). 497–516. 10 indexed citations
8.
Kojima, Sadayoshi, et al.. (1999). Configuration spaces of points on the circle and hyperbolic Dehn fillings, II. Geometriae Dedicata. 89(1). 143–157. 3 indexed citations
9.
Kojima, Masakazu, Sadayoshi Kojima, & Shinji Hara. (1997). Linear Algebra for Semidefinite Programming. Kyoto University Research Information Repository (Kyoto University). 1004(1004). 1–23. 11 indexed citations
10.
Fujii, Michihiko & Sadayoshi Kojima. (1997). Flexible boundaries in deformations of hyperbolic 3-manifolds. Osaka Journal of Mathematics. 34(3). 541–551. 2 indexed citations
11.
Kojima, Sadayoshi, et al.. (1993). Shapes of Stars. Proceedings of the American Mathematical Society. 117(3). 845–845. 2 indexed citations
12.
Kojima, Sadayoshi, et al.. (1993). Shapes of stars. Proceedings of the American Mathematical Society. 117(3). 845–851. 11 indexed citations
13.
Kojima, Sadayoshi. (1988). Isometry transformations of hyperbolic 3-manifolds. Topology and its Applications. 29(3). 297–307. 40 indexed citations
14.
Soma, Teruhiko, Ken’ichi Ohshika, & Sadayoshi Kojima. (1985). TOWARDS A PROOF OF THURSTON'S GEOMETRIZATION THEOREM FOR ORBIFOLDS(Hyperbolic Geometry and 3-Manifolds). Kyoto University Research Information Repository (Kyoto University). 568. 1–72. 3 indexed citations
15.
Kojima, Sadayoshi. (1984). A construction of geometric structures on Seifert fibered spaces. Journal of the Mathematical Society of Japan. 36(3). 6 indexed citations
16.
Kojima, Sadayoshi. (1983). FINITENESS OF SYMMETRIES ON 3-MANIFOLDS. Kyoto University Research Information Repository (Kyoto University). 487(487). 79–81. 3 indexed citations
17.
Kawauchi, Akio & Sadayoshi Kojima. (1980). Algebraic classification of linking pairings on 3-manifolds. Mathematische Annalen. 253(1). 29–42. 52 indexed citations
18.
Kojima, Sadayoshi. (1979). Piecewise linear Dehn's lemma in $4$-dimensions. Proceedings of the Japan Academy Series A Mathematical Sciences. 55(2). 1 indexed citations
19.
Kojima, Sadayoshi. (1979). Classification of simple knots by Levine pairings. Commentarii Mathematici Helvetici. 54(1). 356–367. 14 indexed citations
20.
Kojima, Sadayoshi & Itaru Tamura. (1977). A classification of some even dimensional fibered knots. Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics. 24(3). 671–683. 6 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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