Concurrent Post

Faculty of Political Science and Economics School of Political Science and Economics
Details of a Researcher
Updated on 2022/05/25
Faculty of Political Science and Economics School of Political Science and Economics
理工学術院総合研究所 兼任研究員
Columbia University Graduate School of Arts and Sciences Department of Mathematics
The University of Tokyo
The University of Tokyo Faculty of Science Department of Mathematics
Doctor of Philosophy
Master of Science
Waseda University Faculty of Science and Engineering Professor
Tokyo Institute of Technology School of Computing Professor
Tokyo Institute of Technology Graduate School of Information Science and Engineering Professor
Tokyo Institute of Technology School of Science Associate Professor
Tokyo Metropolitan University Faculty of Science Associate Professor
Tokyo Metropolitan University Faculty of Science Research Associate
American Mathematical Society
日本数学会
日本応用数理学会
Geometry
On the moduli space of equilateral pentagons
S. Klaus, S. Kojima
Beitr. Algebra Geom. 60 487  497 2019 [Refereed]
Normalize entropy versus volume for pseudoAnosovs
S. Kojima, G. McShane
Geom. & Topol 22 2403  2426 2018 [Refereed]
Minimal dilatations of pseudoAnosovs generated by the magic 3manifold and their asymptotic behevior
E. Kin, S. Kojima, M. Takasawa
Algebr. Geom. Topol. 13 3537  3602 2013 [Refereed]
ENTROPY, WEILPETERSSON TRANSLATION DISTANCE AND GROMOV NORM FOR SURFACE AUTOMORPHISMS
Sadayoshi Kojima
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY 140 ( 11 ) 3993  4002 2012.11 [Refereed]
Circle packings on surfaces with projective structures and uniformization
Sadayoshi Kojima, Shigeru Mizushima, Ser Peow Tan
PACIFIC JOURNAL OF MATHEMATICS 225 ( 2 ) 287  300 2006.06 [Refereed]
Circle packings on surfaces with projective structures : A survey
Sadayoshi Kojima, Shigeru Mizushima, Ser Peow Tan
LMS Lecture Notes Series 329 337  353 2006 [Refereed]
Circle packings on surfaces with projective structures
S Kojima, S Mizushima, SP Tan
JOURNAL OF DIFFERENTIAL GEOMETRY 63 ( 3 ) 349  397 2003.03 [Refereed]
Configuration spaces of points on the circle and hyperbolic Dehn fillings, II
Y Yamashita, H Nishi, S Kojima
GEOMETRIAE DEDICATA 89 ( 1 ) 143  157 2002.02 [Refereed]
Complex hyperbolic cone structures on the configuration spaces
SADAYOSHI KOJIMA
Rend. Istit. Mat.. Univ. Trieste 32 149  163 2001 [Refereed]
Configuration spaces of points on the circle and hyperbolic Dehn fillings
S Kojima, H Nishi, Y Yamashita
TOPOLOGY 38 ( 3 ) 497  516 1999.05 [Refereed]
Deformations of hyperbolic 3conemanifolds
S Kojima
JOURNAL OF DIFFERENTIAL GEOMETRY 49 ( 3 ) 469  516 1998.07 [Refereed]
Hyperbolic 3manifolds singular along knots
S Kojima
CHAOS SOLITONS & FRACTALS 9 ( 45 ) 765  777 1998.04 [Refereed]
Flexible boundaries in deformations of hyperbolic 3manifolds
M Fujii, S Kojima
OSAKA JOURNAL OF MATHEMATICS 34 ( 3 ) 541  551 1997.09 [Refereed]
Immersed Geodesic Surfaces in Hyperbolic 3Manifolds
SADAYOSHI KOJIMA
Complex Variables 29 45  58 1996 [Refereed]
Geometry of hyperbolic 3manifolds with boundary
Sadayoshi Kojima
Kodai Mathematical Journal 17 ( 3 ) 530  537 1994 [Refereed]
SHAPES OF STARS
S KOJIMA, Y YAMASHITA
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY 117 ( 3 ) 845  851 1993.03 [Refereed]
HOMOTOPY INVARIANTS OF NONORIENTABLE 4MANIFOLDS
MH KIM, S KOJIMA, F RAYMOND
TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY 333 ( 1 ) 71  81 1992.09 [Refereed]
APOLLONIAN PACKINGS AND HYPERBOLIC GEOMETRY
M ISHIDA, S KOJIMA
GEOMETRIAE DEDICATA 43 ( 3 ) 265  283 1992.09 [Refereed]
Polyhedral decomposition of hyperbolic 3manifolds with totally geodesic boundary
SADAYOSHI KOJIMA
Advanced Study in Pure Math. 20 93  112 1992 [Refereed]
THE SMALLEST HYPERBOLIC 3MANIFOLDS WITH TOTALLY GEODESIC BOUNDARY
S KOJIMA, Y MIYAMOTO
JOURNAL OF DIFFERENTIAL GEOMETRY 34 ( 1 ) 175  192 1991.07 [Refereed]
Polyhedral decomposition of hyperbolic manifolds with boundary
SADAYOSHI KOJIMA
Proceedings of workshop in Pure Mathematics, Seoul N. Univ. 10 ( part iii ) 37  57 1990 [Refereed]
ISOMETRY TRANSFORMATIONS OF HYPERBOLIC 3MANIFOLDS
S KOJIMA
TOPOLOGY AND ITS APPLICATIONS 29 ( 3 ) 297  307 1988.08 [Refereed]
Virtual Betti numbers of some hyperbolic 3manifolds
D. D. Long, S. Kojima
A Fate of Topology, Acadmic Press 417  437 1988 [Refereed]
FINITE COVERS OF 3MANIFOLDS CONTAINING ESSENTIAL SURFACES OF EULER CHARACTERISTIC = 0
S KOJIMA
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY 101 ( 4 ) 743  747 1987.12 [Refereed]
BOUNDING FINITEGROUPS ACTING ON 3MANIFOLDS
S KOJIMA
MATHEMATICAL PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY 96 ( SEP ) 269  281 1984 [Refereed]
A CONSTRUCTION OF GEOMETRIC STRUCTURES ON SEIFERT FIBEREDSPACES
S KOJIMA
JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN 36 ( 3 ) 483  495 1984 [Refereed]
MILNOR MUBARINVARIANTS, MASSEY PRODUCTS AND WHITNEY TRICK IN 4 DIMENSIONS
S KOJIMA
TOPOLOGY AND ITS APPLICATIONS 16 ( 1 ) 43  60 1983 [Refereed]
NILPOTENT COMPLETIONS AND LIERINGS ASSOCIATED TO LINK GROUPS
S KOJIMA
COMMENTARII MATHEMATICI HELVETICI 58 ( 1 ) 115  134 1983 [Refereed]
ALGEBRAIC CLASSIFICATION OF LINKING PAIRINGS ON 3MANIFOLDS
A KAWAUCHI, S KOJIMA
MATHEMATISCHE ANNALEN 253 ( 1 ) 29  42 1980 [Refereed]
Some new invariants of links
S. Kojima, M. Yamasaki
Inventiones math. 54 213  228 1979 [Refereed]
The Matsumoto tripling for compact simply connected 4manifolds
M. Kato, S. Kojima, T. Ohkawa, M. Yamasaki
Tohoku Math. J. 31 525  535 1979 [Refereed]
Piecewise linear Dehn's lemma in 4dimensions
SADAYOSHI KOJIMA
Proceedings of Japan Academy 55 65  67 1979 [Refereed]
Classification of simple knots by Levine pairings
SADAYOSHI KOJIMA
Comment. Math. Helvetici 54 356  367 1979 [Refereed]
A classification of some even dimensional fibered knots
SADAYOSHI KOJIMA
J. Fac. Sci. Univ. Tokyo 24 671  683 1977 [Refereed]
Circle packing and Teichmuller space
European Mathematical Society Publishing House 2008 ISBN: 3037190558
3次元の幾何学
朝倉書店 2002
多角形の現代幾何学 増補版
牧野書店 1999
トポロジー入門
共立出版株式会社 1998
幾何学賞
2000
Geometric Structures on 3manifolds
Hyperbolic Geometry
3次元多様体の幾何構造
双曲幾何学
A numerical algorithm for blockdiagonal decomposition of matrix *algebra
HPOPT 2008
Presentation date： 2008
Entropy vs volume
KIAS Workshop on Hyperbolic Geometry and Related Topics
Presentation date： 2008
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
Presentation date： 2008
A numerical algorithm for blockdiagonal decomposition of matrix *algebra
HPOPT 2008
Presentation date： 2008
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」
Presentation date： 2008
ポアンカレ予想について
静岡大学理学講演会
Presentation date： 2008
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
Presentation date： 2008
Entropy vs volume
KIAS Workshop on Hyperbolic Geometry and Related Topics
Presentation date： 2008
Comparison of hyperbolic volume with other invariants
Workshop on hyperbolic structures on 3manifolds and large scale geometry of Teichmuller space
Presentation date： 2007
Packings on surfaces I
ISM Symposium, Packing and Random Packing
Presentation date： 2006
Packings on projective Riemann surfaces
Teichmuller spaces (Classical and Quantum)
Presentation date： 2006
Quasiisometry of invariants
Presentation date： 2006
Packings on surfaces I
ISM Symposium, Packing and Random Packing
Presentation date： 2006
Packings on projective Riemann surfaces
Teichmuller spaces (Classical and Quantum)
Presentation date： 2006
The Dehn filling space of a certain hyperbolic 3orbifold
Discrete Geometric Analysis
Presentation date： 2004
Nonsingular parts of hyperbolic 3conemanifolds
Topology and Teichm\"uller Spaces
Presentation date： 1996
Determining knots by branched covers
Lowdimensional Topology and Kleinian Groups
Presentation date： 1986
Master's Thesis (Department of Pure and Applied Mathematics)
Graduate School of Fundamental Science and Engineering
2022 full year
Foundations of Analysis 2 [S Grade]
School of Fundamental Science and Engineering
2022 spring semester
Survey of Modern Mathematical Sciences B [S Grade]
School of Fundamental Science and Engineering
2022 spring quarter
Survey of Modern Mathematical Sciences B
School of Fundamental Science and Engineering
2022 spring quarter
Foundations of Set Theory [S Grade]
School of Fundamental Science and Engineering
2022 spring semester
Survey of Modern Mathematical Sciences A [S Grade]
School of Fundamental Science and Engineering
2022 winter quarter
Survey of Modern Mathematical Sciences A
School of Fundamental Science and Engineering
2022 winter quarter
Mathematical Society of Japan Auditor
Science Council of Japan Collaborative member
Japan Society for the Promotion of Sciences RCSS Program Officer
Mathematical Society of Japan Trastee
Mathematical Society of Japan President