Updated on 2024/03/29

写真a

 
INOUE Ayumu
 
Organization
College of Liberal Arts Department of Mathematics Professor
Title
Professor

Degree

  • 博士(理学) ( 2010.3   東京工業大学 )

Research Areas

  • Natural Science / Geometry

Research History

  • Tsuda University   Faculty of Liberal Arts Department of Mathematics   Professor

    2024.4

  • Tsuda University   Faculty of Liberal Arts Department of Mathematics   Associate Professor

    2018.4 - 2024.3

Professional Memberships

  • The Mathematical Society of Japan

    2009.4

 

Papers

  • The knot quandle of the twist-spun trefoil is a central extension of a Schlafli quandle Reviewed

    Ayumu Inoue

    Osaka Journal of Mathematics   60 ( 3 )   597 - 611   2023.7

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  • Crossing numbers and rotation numbers of cycles in a plane immersed graph Reviewed

    Ayumu Inoue, Naoki Kimura, Ryo Nikkuni, and Kouki Taniyama

    Journal of Knot Theory and Its Ramifications   31 ( 11 )   2250076-1 - 2250076-26   2022.10

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1142/S0218216522500754

  • On the knot quandle of a fibered knot, finiteness and equivalence of knot quandles Reviewed

    Ayumu Inoue

    Topology and its Applications   265   106811-1 - 106811-8   2019.7

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1016/j.topol.2019.07.005

  • A subspecies of region crossing change, region freeze crossing change Reviewed

    Ayumu Inoue, Ryo Shimizu

    Journal of Knot Theory and Its Ramifications   25 ( 14 )   1650075-1 - 1650075-9   2016.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1142/S0218216516500759

  • On colorability of knots by rotations, torus knot and PL trochoid Reviewed

    Ayumu Inoue

    Topology and its Applications   183   36 - 44   2015.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1016/j.topol.2015.01.004

  • Quandle homology and complex volume Reviewed

    Ayumu Inoue, Yuichi Kabaya

    Geometriae Dedicata   171 ( 1 )   265 - 292   2014.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1007/s10711-013-9898-2

  • On the availability of quandle theory to classifying links up to link-homotopy Invited

    Ayumu Inoue

    RIMS Kokyuroku   ( 1866 )   1 - 16   2013.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    Other Link: http://www.kurims.kyoto-u.ac.jp/~kyodo/kokyuroku/contents/1866.html

  • Quasi-triviality of quandles for link-homotopy Reviewed

    Ayumu Inoue

    Journal of Knot Theory and Its Ramifications   22 ( 6 )   1350026-1 - 1350026-10   2013.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1142/S0218216513500260

  • Toward obtaining a table of link-homotopy classes: The second homology of a reduced knot quandle Invited

    Ayumu Inoue

    RIMS Kokyuroku   ( 1836 )   7 - 17   2013.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    Other Link: http://www.kurims.kyoto-u.ac.jp/~kyodo/kokyuroku/contents/1836.html

  • A symmetric motion picture of the twist-spun trefoil Reviewed

    Ayumu Inoue

    Experimental Mathematics   22 ( 1 )   15 - 25   2013.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1080/10586458.2013.748310

  • Knot quandles and infinite cyclic covering spaces Reviewed

    Ayumu Inoue

    Kodai Mathematical Journal   33 ( 1 )   116 - 122   2010.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://projecteuclid.org/euclid.kmj/1270559161

  • Quandle and hyperbolic volume Reviewed

    Ayumu Inoue

    Topology and its Applications   157 ( 7 )   1237 - 1245   2010.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1016/j.topol.2010.02.031

  • Quandle homomorphisms of knot quandles to Alexander quandles Reviewed

    Ayumu Inoue

    Journal of Knot Theory and Its Ramifications   10 ( 6 )   813 - 821   2001.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1142/S0218216501001177

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MISC

  • 結び目を代数化する --- カンドルという考え方

    井上 歩

    数理科学   58 ( 4 )   21 - 25   2020.4

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Publisher:サイエンス社  

Presentations

  • 正多胞体が定めるカンドルについて Invited

    井上 歩

    カンドルと対称空間  2020.12.18 

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    Event date: 2020.12.17 - 2020.12.18

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

    Venue:zoom  

  • 結び目に付随する代数系「カンドル」と対称性 Invited

    井上 歩

    非線形波動から可積分系へ  2020.11.8 

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    Event date: 2020.11.7 - 2020.11.8

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

    Venue:zoom  

  • 三葉結び目を分岐集合とする3次元球面の有限巡回分岐被覆空間の三角形分割

    井上 歩

    2019年度琉球結び目セミナー 

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    Event date: 2020.2.15 - 2020.2.16

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:那覇市伝統工芸館会議室  

  • The fibered knots whose knot quandles are finite International conference

    Ayumu Inoue

    The 15th East Asian Conference on Geometric Topology 

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    Event date: 2020.2.10 - 2020.2.13

    Language:English   Presentation type:Oral presentation (general)  

    Venue:京都大学  

  • The twist-spinning of classical knots whose knot quandles are finite International conference

    Ayumu Inoue

    Knots in Tsushima 

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    Event date: 2019.9.6 - 2019.9.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:TIARA (下対馬離島開発センター)  

  • Quandle theory, a language for symmetries International conference

    Ayumu Inoue

    USF Mathematics and Statics Colloquium 

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    Event date: 2019.3.6

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

    Venue:University of South Florida, Florida, U.S.A.  

  • How did I find the mosaic quandle being isomorphic to the knot quandle of the 3-, 4-, or 5-twist-spun trefoil International conference

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    Event date: 2018.12.8 - 2018.12.9

    Language:English   Presentation type:Oral presentation (general)  

  • ファイバー結び目とカンドル理論

    井上 歩

    東京女子大学トポロジーセミナー 

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    Event date: 2018.4.14

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

    Venue:東京女子大学  

  • スピログラフと結び目

    井上 歩

    2017年度琉球結び目セミナー 

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    Event date: 2018.1.20 - 2018.1.21

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:那覇市伝統工芸館会議室  

  • ファイバー結び目の結び目カンドル

    井上 歩

    拡大 KOOK セミナー 2017 

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    Event date: 2017.8.28 - 2017.8.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪工業大学  

  • 対象を代数化することで見えてくる世界 (紐の絡まりを表現する方法)

    井上 歩

    数学と諸分野の協働推進による学術的・総合的な新領域研究の開拓 第8回講演会 

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    Event date: 2017.2.23

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

    Venue:東北大学  

  • 自由に彩色できるブルン絡み目

    井上 歩

    2016年度琉球結び目セミナー 

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    Event date: 2016.12.17 - 2016.12.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:那覇市伝統工芸館会議室  

  • なぜ結び目図式のカンドル彩色から結び目補空間の体積が分かるのか?

    井上 歩

    ハンドル体結び目とその周辺 IX 

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    Event date: 2016.10.9 - 2016.10.10

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

    Venue:近畿大学  

  • 領域交差交換の亜種について International conference

    井上 歩

    日本数学会2016年度秋季総合分科会  日本数学会

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    Event date: 2016.9.15 - 2016.9.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:関西大学  

  • A subspecies of region crossing change, region freeze crossing change International conference

    Ayumu Inoue

    KOOK-TAPU Workshop of Knots in Tsushima Island 

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    Event date: 2016.9.6 - 2016.9.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:TIARA (下対馬離島開発センター)  

  • 領域凍結交差交換とその性質

    井上 歩

    拡大 KOOK セミナー 2016 

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    Event date: 2016.8.22 - 2016.8.25

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪電気通信大学  

  • 領域交差交換の亜種について ~領域凍結交差交換~

    井上 歩

    東京女子大学トポロジーセミナー 

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    Event date: 2016.6.25

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

    Venue:東京女子大学  

  • 領域交差交換の亜種について

    井上 歩

    2016 琉球結び目セミナー 

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    Event date: 2016.2.20 - 2016.2.21

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:那覇市伝統工芸館会議室  

  • 数のマジック(数と図形の関係)

    井上 歩

    第127回研究科セミナー 

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    Event date: 2016.2.15

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

    Venue:名古屋市立大学  

  • Shadow coloring and ideal triangulation International conference

    Ayumu Inoue

    2015 TAPU Workshop on Knot Theory and Related Topics 

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    Event date: 2015.9.21 - 2015.9.23

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

    Venue:Jeju National University International Center, Jeju, Korea  

  • The zeros of Alexander polynomials and colorability of knots by rotations International conference

    Ayumu Inoue

    The Tenth East Asian School of Knots and Related Topics 

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    Event date: 2015.1.26 - 2015.1.29

    Language:English   Presentation type:Oral presentation (general)  

    Venue:East China Normal University, China  

  • Alexander 多項式の零点と回転による結び目彩色

    井上 歩

    東北結び目セミナー 2014 

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    Event date: 2014.10.17 - 2014.10.19

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:カレッジプラザ(秋田)  

  • Colorings of knots by rotations, torus knots and PL trochoids International conference

    Ayumu Inoue

    Colorings of knots by rotations, torus knots and PL trochoids 

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    Event date: 2014.8.22 - 2014.8.26

    Language:English   Presentation type:Oral presentation (general)  

    Venue:BEXCO Convention & Exhibition Center II, Busan, Korea  

  • Colorings of torus knots and PL trochoids

    Ayumu Inoue

    Friday Seminar on Knot Theory 

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    Event date: 2014.1.10

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

    Venue:大阪市立大学  

  • トーラス結び目と PL スピログラフ

    井上 歩

    2013 琉球結び目セミナー 

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    Event date: 2013.9.12 - 2013.9.13

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:てんぶす那覇  

  • Quasi-trivial quandles and their homology for link-homotopy International conference

    Ayumu Inoue

    The 5th KOOK-TAPU Joint Seminar on Knot Theory and Related Topics 

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    Event date: 2013.7.22 - 2013.7.26

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

    Venue:大阪市立大学  

  • On the generalization of the Fox coloring using quandles

    井上 歩

    Kobe Studio Seminar for Mathematics 

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    Event date: 2013.6.11

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

    Venue:神戸大学  

  • On the availability of quandle theory to classifying links up to link-homotopy International conference

    Ayumu Inoue

    Intelligence of Low-dimensional Topology 

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    Event date: 2013.5.22 - 2013.5.24

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

    Venue:京都大学  

  • Quasi-triviality of quandles for link-homotopy International conference

    Ayumu Inoue

    Knots in Washington XXXV 

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    Event date: 2012.12.7 - 2012.12.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:The George Washington University, Washington, DC, U.S.A.  

  • なぜ彩色数は Alexander 多項式で記述できるのか

    井上 歩

    ハンドル体結び目とその周辺 V 

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    Event date: 2012.10.20

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

    Venue:大阪工業大学  

  • Alexander カンドルによる結び目の彩色数について

    井上 歩

    東京女子大学トポロジーセミナー 

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    Event date: 2012.10.5

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

    Venue:東京女子大学  

  • A calculation of a complex volume from a quandle shadow coloring International conference

    Ayumu Inoue

    Low-dimensional Geometry and Topology 

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    Event date: 2012.9.11 - 2012.9.14

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

    Venue:東京工業大学  

  • 「それぞれほどける」は「ぜんぶほどける」か?

    井上 歩

    2012 琉球結び目セミナー 

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    Event date: 2012.9.3 - 2012.9.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:てんぶす那覇  

  • 結び目カンドルの表現からわかる絡み目の幾何について

    井上 歩

    第59回トポロジーシンポジウム 

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    Event date: 2012.8.11 - 2012.8.14

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

    Venue:佐賀大学  

  • An approach to classifying links up to link-homotopy using quandle colorings International conference

    Ayumu Inoue

    RIMS Seminar: Representation spaces, twisted topological invariants and geometric structures of 3-manifolds 

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    Event date: 2012.5.28 - 2012.6.1

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

    Venue:強羅静雲荘  

  • 絡み目ホモトピー不変なカンドルコサイクル不変量

    井上 歩

    日本数学会2012年度年会  日本数学会

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    Event date: 2012.3.26 - 2012.3.29

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京理科大学  

  • An introduction to quandle theory -- On a relationship between a coloring of a knot and a triangulation of the knot complement --

    井上 歩

    Workshop of computer graphics and mathematics 

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    Event date: 2012.1.19

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:神戸大学  

  • Computer aided surface knot theory

    井上 歩

    Workshop of computer graphics and mathematics 

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    Event date: 2012.1.19

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:神戸大学  

  • Quandle and link-homotopy International conference

    Ayumu Inoue

    The Eighth East Asian School of Knots and Related Topics 

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    Event date: 2012.1.9 - 2012.1.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:KAIST, Daejeon, Korea  

  • カンドルを利用した絡み目ホモトピー類の分類に向けて

    井上 歩

    結び目の数学 IV 

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    Event date: 2011.12.24 - 2011.12.27

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京女子大学  

  • Quandle homology and complex volume

    井上 歩

    農工大セミナー 

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    Event date: 2010.11.17

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

    Venue:東京農工大学  

  • Quandle homology and complex volume

    井上 歩

    東大トポロジー火曜セミナー 

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    Event date: 2010.7.27

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

    Venue:東京大学  

  • A formula for volumes and Chern-Simons invariants of link complements via quandle shadow colorings

    井上 歩

    4次元トポロジー 

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    Event date: 2010.1.18 - 2010.1.20

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:広島大学  

  • Quandle and hyperbolic volume International conference

    Ayumu Inoue

    Volume Conjecture (Invariants and geometry of knots) 

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    Event date: 2010.1.14 - 2010.1.16

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

    Venue:早稲田大学  

  • Quandle and hyperbolic volume International conference

    Ayumu Inoue

    AMS 2009 Fall Western Section Meeting  American Mathematical Society

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    Event date: 2009.11.7 - 2009.11.8

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

    Venue:University of California, Riverside, California, U.S.A.  

  • Hyperbolic volume is a cocycle of a quandle

    Ayumu Inoue

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    Event date: 2009.9.24 - 2009.9.27

    Language:Japanese   Presentation type:Oral presentation (general)  

  • Quandle and hyperbolic volume

    Ayumu Inoue

    Group Seminar @ Murakami Lab. 

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    Event date: 2009.6.25

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

    Venue:東京工業大学  

  • Quandle and hyperbolic volume

    井上 歩

    首都大学東京微分幾何学セミナー 

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    Event date: 2009.6.5

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

    Venue:首都大学東京  

  • Quandle and hyperbolic volume

    井上 歩

    Winter Workshop 2009 on Low-Dimensional Topology and its Ramifications 

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    Event date: 2009.3.6 - 2009.3.9

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

    Venue:名城大学名駅サテライト  

  • A natural ch-diagram of the n-twist-spun trefoil knot International conference

    井上 歩

    4次元トポロジー 

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    Event date: 2009.1.26 - 2009.1.28

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:広島大学  

  • A natural ch-diagram of the n-twist-spun trefoil knot International conference

    Ayumu Inoue

    The Fifth East Asian School of Knots and Related Topics 

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    Event date: 2009.1.11 - 2009.1.16

    Language:English   Presentation type:Oral presentation (general)  

    Venue:慶州教育文化会館, 韓国  

  • A natural ch-diagram of the n-twist-spun trefoil knot

    井上 歩

    結び目の数学 

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    Event date: 2008.12.23 - 2008.12.26

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京女子大学  

  • Quandle and hyperbolic volume

    Ayumu Inoue

    Friday Seminar on Knot Theory 

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    Event date: 2008.12.12

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

    Venue:大阪市立大学  

  • Quandle and hyperbolic volume

    井上 歩

    東京女子大学トポロジーセミナー 

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    Event date: 2008.11.22

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

    Venue:東京女子大学  

  • Quandle and hyperbolic volume

    井上 歩

    広島大学トポロジー幾何セミナー 

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    Event date: 2008.11.8

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

    Venue:広島大学  

  • A natural ch-diagram of the n-twist spun trefoil knot International conference

    Ayumu Inoue

    Topology and Computer 2008 

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    Event date: 2008.8.27 - 2008.8.29

    Language:English   Presentation type:Oral presentation (general)  

    Venue:東京工業大学  

  • A natural ch-diagram of the n-twist spun trefoil knot

    Ayumu Inoue

    Group Seminar @ Murakami Lab. 

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    Event date: 2008.5.29

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

    Venue:東京工業大学  

  • On constructing knot invariants via quandles

    井上 歩

    奈良女子大学トポロジーセミナー 

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    Event date: 2007.11.20

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

    Venue:奈良女子大学  

  • Two kinds of knot quandles and their representations International conference

    Ayumu Inoue

    Knotting Mathematics and Art: International Conference in Low Dimensional Topology and Mathematical Art 

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    Event date: 2007.11.1 - 2007.11.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:University of South Florida, Tampa, Florida, U.S.A.  

  • Knot quandles and their representations

    井上 歩

    東工大トポロジーセミナー 

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    Event date: 2007.4.18

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

    Venue:東京工業大学  

  • Quandle homomorphisms of knot quandles to Alexander quandles

    井上 歩

    結び目の不変量と幾何構造 

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    Event date: 2000.10.16 - 2000.10.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪市立大学文化交流センター  

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Research Projects

  • 結び目の諸構造とカンドルコサイクル不変量

    Grant number:19K03476  2019.04 - 2023.03

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    井上 歩

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    Grant amount:\2340000 ( Direct Cost: \1800000 、 Indirect Cost:\540000 )

    結び目とは絡まった紐のことである.一見して乱雑に絡まっている結び目でも,ある構造に着目すれば,特徴を見出せることがある.その特徴を研究することは,例えば高分子といった複雑に絡み合った物質の特性を研究する上でも,有益である.そこで,カンドルと呼ばれる代数を活用して,結び目が備える種々の構造を研究する.
    カンドルは結び目を研究する目的において優れた代数系である.カンドルの公理は,ライデマイスター変形と呼ばれる,結び目図式の局所変形を代数的に表したものと理解することができる.また研究代表者は,先行研究として,結び目に対して定まる結び目カンドルの基本類が結び目補空間の三角形分割と密接に関係していることを示している.これらの事実は,結び目の研究にカンドルを用いることの有用性を示す根拠とも言える.本年度は,このような根拠をさらに見出すことを目標に,研究を行った.
    どのような結び目に対しても,その結び目を境界とする,空間内に埋め込まれた向き付け可能な曲面が存在する.この曲面をその結び目のザイフェルト曲面と言う.一つの結び目に対して,ザイフェルト曲面は無数に存在する.特に,結び目の図式からあるアルゴリズムに従ってザイフェルト曲面を構成することができる.これを,その結び目の,標準的ザイフェルト曲面と言う.
    研究代表者は,カンドルの鎖複体から群の相対鎖複体への新たな鎖写像を構成した.特に,この鎖写像による結び目カンドルの基本類の代表元の像は,標準的ザイフェルト曲面の三角形分割と理解することができる.このことを活用して,標準的ザイフェルト曲面から種数が最小のザイフェルト曲面を構成する方法について研究を行った.研究は順調に進んでいるが,まだ結論までには至っていない.そのため,研究期間を一年間延長して,研究を継続することとした.
    ザイフェルト曲面は結び目が備える代表的な構造の一つである.このザイフェルト曲面とカンドルとの間に関係性を見出したことは,本研究の目的を一つ達成したと言える.さらに,標準的ザイフェルト曲面から最小種数のザイフェルト曲面を構成する方法が確立できれば,結び目理論のさらなる発展の礎となるはずである.
    順調に進んでいるため,本年度の研究をさらに発展させる.

Travelling overseas in which it aimed at research activities

  • 2019 FY, Canada ,Less than a month

  • 2018 FY, U.S.A. ,Less than a month

  • 2017 FY, U.S.A. ,Less than a month

  • 2016 FY, U.S.A. ,Less than a month