Updated on 2026/03/07

写真a

 
SUZUKI MASAAKI
 
Organization
Undergraduate School School of Interdisciplinary Mathematical Sciences Professor
Title
Professor
Other name(s)
SUZUKI Masaaki
External link

Degree

  • 博士(数理科学) ( 2003.3   東京大学 )

  • 修士(数理科学) ( 2000.3   東京大学 )

Research Interests

  • Mapping class group

  • Twisted Alexander polynomial

  • epimorphism between knot groups

Research Areas

  • Natural sciences / Geometry  / 幾何学(Geometry)

Education

  • The University of Tokyo   Graduate School of Mathematical Sciences

    2000.4 - 2003.3

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    Country/Region: Japan

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  • The University of Tokyo   Graduate School of Mathematical Sciences

    1998.4 - 2000.3

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    Country/Region: Japan

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Research History

  • Meiji University   School of Interdisciplinary Mathematical Sciences   Professor   Professor

    2018.4

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  • Meiji University   School of Interdisciplinary Mathematical Sciences   Associate Professor   Associate Professor

    2013.4 - 2018.3

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  • Akita University   Faculty of Education and Human Studies   Associate Professor   Associate Professor

    2006.4 - 2013.3

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Professional Memberships

  • Mathematical Society of Japan

    2001.3

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Committee Memberships

  • 秋田県立大館鳳鳴高等学校スーパーサイエンス事業運営指導委員会   委員  

    2007.4 - 2013.3   

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Papers

  • Torsion elements in the associated graded of the Y$Y$‐filtration of the monoid of homology cylinders Reviewed

    Yuta Nozaki, Masatoshi Sato, Masaaki Suzuki

    Journal of Topology   18 ( 3 )   2025.6

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    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    Abstract

    Clasper surgery induces the ‐filtration over the monoid of homology cylinders, which serves as a 3‐dimensional analogue of the lower central series of the Torelli group of a surface. In this paper, we investigate the torsion submodules of the associated graded modules of these filtrations. To detect torsion elements, we introduce a homomorphism on induced by the degree part of the LMO functor. Additionally, we provide a formula that computes this homomorphism under clasper surgery, and use it to demonstrate that every nontrivial torsion element in has order 3.

    DOI: 10.1112/topo.70028

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  • Two-tone colorings and surjective dihedral representations for links Reviewed

    K. Ichihara, K. Ishikawa, E. Matsudo, and M. Suzuki

    Osaka Journal of Mathematics   62   381 - 393   2025

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  • Genera and crossing numbers of $2$-bridge knots Reviewed International coauthorship International journal

    Masaaki Suzuki and Anh T. Tran

    Fundamenta Mathematicae   264 ( 2 )   179 - 195   2024

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  • Blanchfield pairings and Gordian distance Reviewed International coauthorship International journal

    Stefan Friedl, Takahiro Kitayama, Masaaki. Suzuki

    International Journal of Mathematics   35   2024

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  • On the braid index of a two-bridge knot Reviewed International coauthorship International journal

    Masaaki Suzuki and Anh T. Tran

    Journal of Knot Theory and Its Ramifications   33   2024

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  • A non-commutative Reidemeister-Turaev torsion of homology cylinders Reviewed International journal

    Yuta Nozaki, Masatoshi Sato, and Masaaki Suzuki

    Transactions of the American Mathematical Society   376   5045 - 5088   2023

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  • On a theorem of Friedl and Vidussi Reviewed International journal

    Takayuki Morifuji and Masaaki Suzuki

    International Journal of Mathematics   33 ( 13 )   2022.12

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  • Abelian quotients of the $Y$-filtration on the homology cylinders via the LMO functor Reviewed International journal

    Yuta Nozaki, Masatoshi Sato, and Masaaki Suzuki

    Geometry and Topology   26 ( 1 )   221 - 282   2022.4

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  • On the kernel of the surgery map restricted to the 1‐loop part Reviewed International journal

    Yuta Nozaki, Masatoshi Sato, Masaaki Suzuki

    Journal of Topology   15   587 - 619   2022.4

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  • Generating functions on epimorphisms between $2$-bridge knot groups Reviewed International journal

    Masaaki Suzuki

    Journal of Knot Theory and Its Ramifications   30   2021.12

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  • Torelli group, Johnson kernel, and invariants of homology spheres Reviewed International journal

    Shigeyuki Morita, Takuya Sakasai, Masaaki Suzuki

    Quantum Topology   11 ( 2 )   379 - 410   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:European Mathematical Society - EMS - Publishing House GmbH  

    In the late 1980s, it was shown that the Casson invariant appears in the difference between the two filtrations of the Torelli group: the lower central series and the Johnson filtration, and its core part was identified with the secondary characteristic class d_1 associated with the fact that the first \mathrm{MMM} class vanishes on the Torelli group (however it turned out that Johnson proved the former part highly likely prior to the above, see Remark 1.1). This secondary class d_1 is a rational generator of H^1(\mathcal{K}_g;\mathbb Z)^{\mathcal{M}_g}\cong\mathbb Z where \mathcal{K}_g denotes the Johnson subgroup of the mapping class group \mathcal{M}_g . Hain proved, as a particular case of his fundamental result, that this is the only difference in degree 2 . In this paper, we prove that no other invariant than the above gives rise to new rational difference between the two filtrations up to degree 6 . We apply this to determine H_1(\mathcal{K}_g;\mathbb Q) explicitly by computing the description given by Dimca, Hain and Papadima. We also show that any finite type rational invariant of homology 3 -spheres of degrees up to 6 , including the second and the third Ohtsuki invariants, can be expressed by d_1 and lifts of Johnson homomorphisms.

    DOI: 10.4171/qt/138

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  • Alternating knots with Alexander polynomials having unexpected zeros Reviewed International journal

    Mikami Hirasawa, Katsumi Ishikawa, and Masaaki Suzuki

    Topology and its Applications   253   48 - 56   2019.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

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  • An abelian quotient of the symplectic derivation Lie algebra of the free Lie algebra Reviewed International journal

    Shigeyuki Morita, Takuya Sakasai, and Masaaki Suzuki

    Experimental Mathematics   27   302 - 315   2018

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  • Genera of two-bridge knots and epimorphisms of their knot groups Reviewed International journal

    Masaaki Suzuki and Anh T. Tran

    Topology and its Applications   242   66 - 72   2018

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  • Epimorphisms between 2-bridge knot groups and their crossing numbers Reviewed

    Masaaki Suzuki

    ALGEBRAIC AND GEOMETRIC TOPOLOGY   17 ( 4 )   2413 - 2428   2017

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2140/agt.2017.17.2413

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  • Symmetry of symplectic derivation Lie algebra of free Lie algebras Reviewed

    Shigeyuki Morita, Takuya Sakasai, and Masaaki Suzuki

    RIMS Kokyuroku Bessatsu, Geometry and Analysis of Discrete Groups and Hyperbolic Spaces   B66   184 - 195   2017

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  • On minimality of two-bridge knots Reviewed International journal

    Fumikazu Nagasato, Masaaki Suzuki, and Anh Tran

    International Journal of Mathematics   28 ( 3 )   2017

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1142/S0129167X17500203

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  • Non-meridional epimorphisms of knot groups Reviewed

    Jae Choon Cha, Masaaki Suzuki

    ALGEBRAIC AND GEOMETRIC TOPOLOGY   16 ( 2 )   1135 - 1155   2016

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    DOI: 10.2140/agt.2016.16.1135

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  • Monodromy maps of fibered 2-bridge knots as elements in automorphism groups of free groups Reviewed

    Hiroshi Goda, Masaaki Suzuki

    Kyungpook Mathematical Journal   56 ( 3 )   927 - 938   2016

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Kyungpook National University  

    DOI: 10.5666/KMJ.2016.56.3.927

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  • Structure of symplectic invariant Lie subalgebras of symplectic derivation Lie algebras Reviewed

    Shigeyuki Morita, Takuya Sakasai, Masaaki Suzuki

    ADVANCES IN MATHEMATICS   282   291 - 334   2015.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.aim.2015.06.017

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  • Integral Euler Characteristic of Out F-11 Reviewed

    Shigeyuki Morita, Takuya Sakasai, Masaaki Suzuki

    EXPERIMENTAL MATHEMATICS   24 ( 1 )   93 - 97   2015

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    DOI: 10.1080/10586458.2014.956373

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  • Computations in formal symplectic geometry and characteristic classes of moduli spaces Reviewed

    Shigeyuki Morita, Takuya Sakasai, Masaaki Suzuki

    Quantum Topology   6 ( 1 )   139 - 182   2015

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:European Mathematical Society Publishing House  

    DOI: 10.4171/QT/61

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  • Meridional and non-meridional epimorphisms between knot groups Reviewed International journal

    Masaaki Suzuki

    Handbook of group actions   31   577 - 602   2015

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  • A NOTE ON DEGREES OF TWISTED ALEXANDER POLYNOMIALS II Reviewed

    Takayuki Morifuji, Masaaki Suzuki

    BULLETIN OF THE KOREAN MATHEMATICAL SOCIETY   50 ( 3 )   929 - 934   2013.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4134/BKMS.2013.50.3.929

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  • Abelianizations of derivation Lie algebras of the free associative algebra and the free Lie algebra Reviewed International journal

    Shigeyuki Morita, Takuya Sakasai, Masaaki Suzuki

    Duke Mathematical Journal   162 ( 5 )   965-1002 - 1002   2013

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    DOI: 10.1215/00127094-2140560

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  • A table of genus two hadlebody-knots up to six crossings Reviewed International journal

    Atsushi Ishii, Kengo Kishimoto, Hiromasa Moriuchi, and Masaaki Suzuki

    Journal of Knot Theory and Its Ramifications   21 ( 4 )   9 pages   2012

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    DOI: 10.1142/S0218216511009893

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  • On the number of SL(2;Z/pZ)-representations of knot groups Reviewed International journal

    Teruaki Kitano and Masaaki Suzuki

    Journal of Knot Theory and Its Ramifications   21 ( 1 )   18 pages   2012

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    DOI: 10.1142/S021821651100973X

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  • An integral region choice problem on knot projection Reviewed International journal

    Kazushi Ahara and Masaaki Suzuki

    Journal of Knot Theory and Its Ramifications   21 ( 11 )   20 pages   2012

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    DOI: 10.1142/S0218216512501192

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  • A partial order on the set of prime knots with up to 11 crossings Reviewed International journal

    Keiichi Horie, Teruaki Kitano, Mineko Matsumoto, and Masaaki Suzuki

    Journal of Knot Theory and Its Ramifications   20 ( 2 )   275-303 - 303   2011

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    DOI: 10.1142/S0218216511008747

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  • Representations of the braid group and punctured torus bundles Reviewed International journal

    Takayuki Morifuji

    Kyungpook Mathematical Journal   49 ( 1 )   7-14 - 14   2009

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Kyungpook National University  

    DOI: 10.5666/KMJ.2009.49.1.007

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  • Twisted Alexander polynomial and a partial order on the set of prime knots Reviewed International journal

    Teruaki Kitano and Masaaki Suzuki

    Geometry and Topology Monographs   13   307-321   2008

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  • New examples of elements in the kernel of the Magnus representation of the Torelli group Reviewed International journal

    Masaaki Suzuki

    Groups of Diffeomorphisms   479-490   2008

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  • A partial order in the knot table II Reviewed International journal

    Teruaki Kitano and Masaaki Suzuki

    Acta Matheimatica Sinica, English Series   24 ( 11 )   1801-1816 - 1816   2008

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    DOI: 10.1007/s10114-008-6269-2

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  • On the existence of a surjective homomorphism between knot groups Reviewed International journal

    Teruaki Kitano and Masaaki Suzuki

    Intelligence of Low Dimensional Topology 2006   173-177   2007

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  • Geometric interpretation of the Magnus representation of the mapping class group Reviewed

    Masaaki Suzuki

    Kobe Journal of Mathematics   22   39-47 - 47   2005

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Kobe University  

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  • On the kernel of the Magnus representation of the Torelli group Reviewed International journal

    Masaaki Suzuki

    Proceedings of the American Mathematical Society   133 ( 6 )   1865-1872 - 1872   2005

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  • Twisted Alexander polynomials and surjectivity of a group homomorphism Reviewed International journal

    Teruaki Kitano, Masaaki Wada, and Masaaki Suzuki

    Algebraic and Geometric Topology   5   1315-1324 - 1324   2005

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  • A partial order in the knot table Reviewed International journal

    Teruaki Kitano and Masaaki Suzuki

    Experimental Mathematics   14 ( 4 )   385-390 - 390   2005

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  • Twisted Alexander polynomial for the Lawrence-Krammer representation

    Masaaki Suzuki

    Bulletin of the Australian Mathematical Society   70 ( 1 )   67-71 - 71   2004

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  • Irreducible Decomposition of the Magnus Representation of the Torelli Group Reviewed International journal

    Masaaki Suzuki

    Bulletin of the Australian Mathematical Society   67 ( 1 )   1-14 - 14   2003

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  • A class function on the Torelli group Reviewed

    Masaaki Suzuki

    Kodai Mathematical Journal   26 ( 3 )   304-316 - 316   2003

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    DOI: 10.2996/kmj/1073670611

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  • On the Magnus representation of the mapping class group Reviewed

    Masaaki Suzuki

    Interdisciplinary Information Sciences   9   77-80 - 80   2003

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Tohoku University  

    The Magnus representation of the Torelli group has been defined in virtue of Fox derivation. The Torelli group is a significant subgroup of the mapping class group of a surface. In this paper, we show some properties of the characteristic polynomials of matrices obtained from the Magnus representation of the Torelli group, which is a class function on the Torelli group.

    DOI: 10.2996/kmj/1073670611

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    Other Link: https://jlc.jst.go.jp/DN/JALC/00167449544?from=CiNii

  • The Magnus Representation of the Torelli Group I_{g,1} is not faithful for g >= 2 Reviewed International journal

    Masaaki Suzuki

    Proceedings of the American Mathematical Society   130 ( 3 )   909-914 - 914   2002

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Presentations

  • Twisted Alexander polynomials for a certain extension Invited

    Masaaki Suzuki

    East Asian Conference on Geometric Topology  2026.2 

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    Event date: 2026.2

    Language:English   Presentation type:Oral presentation (invited, special)  

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  • Twisted Alexander polynomials of knots associated to the regular representations of finite groups Invited

    Masaaki Suzuki

    Knot theory, LMO invariants and related topics  2024.3 

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    Event date: 2024.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Okinawa Institute of Science and Technology   Country/Region:Japan  

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  • Twisted Alexander vanishing order of knots International conference

    Masaaki Suzuki

    Winter School on Low-dimensional Topology  2023.12 

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    Event date: 2023.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Pohang University of Science and Technology   Country/Region:Korea, Republic of  

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  • Knot group, symmetric group, dihedral group, and twisted Alexander polynomial Invited International conference

    East Asian Conference on Geometric Topology  2022.1 

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    Event date: 2022.1

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Korea Institute for Advanced of Korea (ZOOM)   Country/Region:Korea, Republic of  

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  • On the minimal orders of knots and the twisted Alexander polynomial Invited

    OIST Hikami Unit seminar  2023.9 

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  • Epimorphisms between knot groups and twisted Alexander polynomial Invited International conference

    Topology and Geometry of Low-dimensional Manifolds  2022.1 

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  • Generating function on epimorphisms between 2-bridge knot groups Invited International conference

    Masaaki Suzuki

    East Asian Conference on Geometric Topology 2021  2021.1 

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  • On a structure of the symplectic derivation Lie algebra of the free Lie algebra Invited International conference

    Teichmüller Theory: Classical, Higher, Super and Quantum  2020.10  Centre international de rencontres mathematiques

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Luminy, France  

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  • Epimorphisms between two-bridge knot groups - crossing number, genus

    トポロジーとコンピュータ2020  2020.9 

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Epimorphisms between knot groups Invited

    Masaaki Suzuki

    SFB Seminar  2020.2 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Regensburg University  

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  • Computations of Johnson homomorphisms and symplectic derivation algebra Invited

    低次元トポロジー in 白神  2019.10 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:あきた白神体験センター  

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  • Two filtrations of the Torelli group

    日本数学会年会  2019.9 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:金沢大学  

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  • The symplectic derivation Lie algebra of the free Lie algebra Invited International conference

    Graph complexes in algebraic geometry and topology  2019.9 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:University of Manchester, UK  

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  • Two filtrations of the Torelli group Invited International conference

    Masaaki Suzuki

    East Asian Conference on Geometric Topology 2019  2019.1 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Peking University, Beijing, China  

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  • Two filtrations of the Torelli group International conference

    Topology and Computer 2018  2018.10 

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    Language:English   Presentation type:Oral presentation (general)  

    Venue:Nara Women's University  

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  • Genera of two-bridge knots and epimorphisms of their knot groups

    東北結び目セミナー  2018.10 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:秋田  

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  • Genera of two-bridge knots and epimorphisms of their knot groups

    日本数学会年会  2018.9  日本数学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岡山大学  

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  • Genera of two-bridge knots and epimorphisms of their knot groups

    日本数学会年会  2018.9  日本数学会

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岡山大学  

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  • Computations of Johnson homomorphisms Invited International conference

    New Trends in Teichmüller Theory and Mapping Class Groups  2018.9 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Oberwolfach, Germany  

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  • Epimorphisms between knot groups - crossing number, genus Invited International conference

    East Asian School of Knots and Related Topics  2018.1 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:KAIST  

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  • Epimorphisms between knot groups Invited

    Seminar Geometry, Topology, Dynamical Systems  2017.3 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:The University of Texas at Dallas  

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  • Epimorphisms between two-bridge knot groups and their crossing numbers International conference

    The 12th East Asian School of Knots and Related Topics  2017.2 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:University of Tokyo  

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  • Epimorphisms between two-bridge knot groups and their crossing numbers Invited

    Fundamental Groups, Representations and Geometric Structures in 3-Manifold Topology  2016.11 

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  • Epimorphisms between knot groups Invited

    Geometry seminar  2016.11 

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  • Epimorphisms between two-bridge knot groups and their crossing numbers

    Topology and Computer 2016  2016.10 

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  • Epimorphisms between knot groups Invited International conference

    International Conference for the 70th Anniversary of Korean Mathematical Society  2016.10  Korean Mathematical Society

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Seoul National University  

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  • Computations in formal symplectic geometry and characteristic classes of moduli spaces Invited

    Workshop on Automorphisms of free groups  2015.11 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:University of Copenhagen  

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  • Non-meridional epimorphisms between knot groups Invited

    RIMS Seminar: Topology, Geometry and Algebra of low-dimensional manifolds  2015.5 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:KKR Numazu Hamayu  

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  • Non-meridional epimorphisms between knot groups International conference

    The Tenth East Asian School of Knots and Related Topics  2015.1 

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Meridional and non-meridional epimorphisms between knot groups Invited

    Departmental Colloquia  2014.10 

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    Venue:University of South Alabama  

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  • Meridional and non-meridional epimorphisms between knot groups Invited

    Shonan meeting seminar  2014.4 

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    Venue:Shonan  

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  • Meridional and non-meridional epimorphisms between knot groups Invited

    Topology Seminar  2013.10 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Indiana University  

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  • Meridional and non-meridional epimorphisms between knot groups

    Geometry Seminar, University of Pisa, Italy  2013.3 

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  • An integral region choice problem on knot projection

    The 9th East Asian School of Knots and Related Topics  2013.1 

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  • Meridional and non-meridional epimorphisms between knot groups International conference

    Group actions and applications in geometry, topology and analysis  2012.7 

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  • Epimorphisms between knot groups and the images of meridians

    The 8th East Asian School of Knots and Related Topics  2012.1 

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  • Epimorphisms between knot groups and the images of meridians

    Circle valued Morse theory and Alexander invariants  2011.11 

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  • メリディアンを保たない結び目群間の全射について

    トポロジーとコンピュータ2011  2011.11 

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    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Epimporphisms between knot groups and the image of meridians

    Topology Seminar, Peking University, China  2011.10 

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    Language:English   Presentation type:Oral presentation (general)  

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  • 自由結合代数の微分のなすリー代数のアーベル化

    逆井卓也

    リーマン面に関連する位相幾何学  2011.9 

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  • Epimorphisms between knot groups: determination of the partial order

    Twisted topological invariants and topology of low-dimensional manifolds  2010.9 

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  • On the graded Magnus representation of the mapping class group

    Topology and Computer 2010  2010.9 

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  • Epimorphisms between knot groups

    Claremont Topology Seminar  2010.3 

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  • Epimorphisms between knot groups

    CalTech Geometry and Topology Seminar, USA  2009.12 

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  • Epimorphisms between knot groups

    Geometry and Topology Seminar, University of Southern California, USA  2009.10 

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  • Epimorphisms between the groups of 2-bridge knots with up to 12 crossings

    Topology and Computer 2009  2009.9 

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  • A partial order on the set of prime knots with up to 11 crossings

    Toulouse Topology Seminar, France  2009.6 

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  • On the Magnus representation of the mapping class group

    シンプレクティック幾何とその周辺  2008.11 

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  • On the Magnus representation of the mapping class group

    Finite type invariants, fat graphs and Torelli-Johnson-Morita theory  2008.3 

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Research Projects

  • 結び目群間の全射準同型と結び目の不変量との関連についての研究

    2020.4

    基盤研究(C) 

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    Authorship:Principal investigator 

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  • 結び目群間の全射準同型の存在決定と幾何的解釈に関する研究

    Grant number:16K05159  2016.4 - 2023.3

    日本学術振興会  基盤研究(C)  基盤研究(C)

    鈴木 正明

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    Authorship:Principal investigator 

    10交点以下の素な結び目に対して、結び目群間の全射準同型の存在もしくは非存在についてを決定することが出来た。これまではメリディアンを保つ、すなわちメリディアンをメリディアンに写す全射準同型の存在と非存在については決定が出来ていた。それはメリディアンの情報があるため、全射準同型に強い条件が要請されていることになり、存在や非存在を決定することは、条件なしの全射準同型に比べて決定が容易であった。それに対して、今回は全射準同型の条件を付けずにその存在もしくは非存在を決定することが出来た。
    特に非存在を証明するには結び目群から対称群への準同型を調べ、対称群の標準的な表現を合成させて得られるねじれアレキサンダー多項式を用いた。メリディアンを保つ全射準同型を考察する際はこの判定条件がさらに強い条件となっているので、比較的容易に判定することができ、実際にSL(2,Z/pZ)への表現を用いて確定することが出来た。しかし、メリディアンを保つとは限らない全射準同型の非存在を証明するためには、かなり大きな素数を用いてもSL(2,Z/pZ)への表現では非存在を確定することが出来ず、対称群への準同型とその標準的な表現を用いた。
    このとき、SL(2,Z/pZ)と比べて、対称群の共役類分解をした際の共役類の元の個数が多いため、計算量は一般に多くなることが多い。また表現の次元もSL(2,Z/pZ)表現が常に2次元なことに比べて大きくなるため、行列式の計算も計算量が多くなる。

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  • 結び目群のメリディアンを保たない全射準同型に関する研究

    2012 - 2014

    若手研究 (B) 

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  • 写像類群の高次マグナス表現の忠実性に関する研究

    2009 - 2011

    若手研究 (B) 

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  • 曲面の写像類群とその線型表現

    2006 - 2007

    研究活動スタート支援 

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  • 曲面の写像類群の代数的構造と線型表現

    2005

    特別研究員奨励費 

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  • 写像類群とその表現

    2002 - 2003

    特別研究員奨励費 

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