アブストラクト事後公開 — 2018年度年会(於:東京大学)
トポロジー分科会
特別講演 ポリヘドラル・プロダクトのホモトピー論 岸本大祐 (京大理) A polyhedral product is a space constructed combinatorially from a given abstract simplicial complex. Its homotopy invariants like cohomology give important combinatorially defined algebras such as Stanley–Reisner rings, and it is also important in toric topology. So there have been considerable efforts to develop the homotopy theory of polyhedral products in view of both combinatorics and topology. But there is no general technique to develop the homotopy theory of polyhedral products until the fat wedge filtration has been introduced. I will present a survey of the recent development of the homotopy theory of polyhedral products based on the fat wedge filtration and its applications. This talk is based on the joint work of Kouyemon Iriye (Osaka Prefecture University). msjmeeting2018mar10i001 

特別講演 滑らかな力学系の周期点の個数の増大度 浅岡正幸 (京大理) The exponential rate of the growth rate of the number of periodic points is an important invariant of a dynamical sytems. For example, it determines the convergence radius of the dynamical zeta function of the system and, for hyperbolic dynamics, it determines the topological entropy. It is natural to ask whether ‘most’ of smooth dynamical systems exhibit at most exponential growth of the number of periodic points or not. Some classical results showed that systems in a dense subset of the set of smooth maps in general dimensions and all realanalytic onedimensional systems exhibit such tame growth. However, in 2000, Kaloshin proved that superexponential growth is ‘abundant’ in smooth dynamics, and recently, the author found ‘abundant’ examples in realanalytic dynamics. In the first part of the talk, we survey classical results on at most exponential growth for tame cases, including hyperbolic systems. In the second part, we discuss contemporary results for wild cases. msjmeeting2018mar10i002 

特別講演 3次元トポロジーの冪零的研究 野坂武史 (東工大) The purpose of this talk is to explain nilpotent studies in lowdimensional topology, and to introduce my resent results on this topic. In particular, we focus on the topic of Milnor–Orr invariants, higher Massey products, and tree part of the Kontsevich invariant of links. The main result is that I gave diagrammatic computation of these invariants (of appropriate degree), and computed some examples. In the nilpotent work, the nilpotent quotient of the free group plays key role. So, in this talk, I start by reviewing properties and homology of the quotient group. After that, I briefly explain the above invariants with properties, and introduce the diagrammatic computations. Here we consider a comparison with known results concerning the mapping class group. Finally, I roughly show a future plan. msjmeeting2018mar10i003 

1. 
$n$次元単体の構成とオイラーポアンカレ標数の拡張と組合せの数 岩山瑛子 I have constructed the simplex $\mathrm{MS}_n$ of $n$dim. The alternative sum of numbers of $k$dimsubsimplexes $\mathrm{MS}^k_n$ of $n$simplex $\mathrm{MS}_n$ are New Euler–Poincaré Expanded characteristic “NEPE”. I have had $\mathrm{NEPE}=1$ for all dim. $n$. I have obtained the table like “Pascal’s triangle” for $\mathrm{M}^k_n\ (k=0, 1, \cdots, n)$ and we also have $\mathrm{M}^k_n={}_{n+1}C_{k+1}$ (${}_{n+1}C_{k+1}$: combinatorial numbers). 

2. 
$n$次元直方体の三角形とオイラーポアンカレ標数の拡張 岩山瑛子 I have constructed the cuboid $\mathrm{M}_n$ of $n$dim. The alternative sum of numbers of $k$dim. subcuboids $\mathrm{M}^k_n$ are “New Euler–Poincaré Expanded characteristic NEPE”. I have had $\mathrm{NEPE}=1$ for all dim. $n$. We can connect $4$ dim. cuboid with hyper planes. If the complex of cubes has $2$holes, then $\mathrm{NEPE}=1$. 

3. 
トポロジーが持つ応用可能性について 小笠原義仁 (早大複雑系高等研) New possibility of topological application is explored. In this study, topology is not only regarded as a system of morphological concepts, but also tried to be interpreted as the discussion of conceptual morphology. This means that our concepts themselves are tried to be described by the topology which is a system of our concepts, as mathematical system itself is described by mathematics in the field of foundations of mathematics. Then, new picture of the world is tried to be drawn by such a sense of topology. The world is not regarded as a priori existence, but tried to be described as the emergence from our recognition. 

4. 
Infinitely many corks having large shadowcomplexities 直江央寛 (東北大理) Any exotic pair of simply connected closed 4manifolds are related by a cork twist. Every 4manifold can be represented by a simple polyhedron with a coloring on each region, called a shadow. Using shadows of 4manifolds, Costantino defined a complexity of a 4manifold, which is the minimum number of true vertices of its shadow. We have known many examples of corks having low complexities. In this talk, we will show that there also exist infinitely many corks with large complexity. 

5. 
種数0のLefschetzファイバー空間の符号数について 宮村 旭 (東工大理) In this talk, we present a signature formula for allowable Lefschetz fibrations over $D^2$ with planar fiber by computing Maslov index appearing in Wall’s nonadditivity formula. 

6. 
パンツのHitchin成分のFuchs跡について 稲垣友介 (阪大理) Hitchin components are the connected components of character varieties of surface groups containing Teichmüller spaces, and the subsets of Hitchin components which correspond to Teichmüller spaces are called Fuchsian loci. Recently Bonahon–Dreyer constructed a parameterization of ${\rm PSL}_n(\mathbb{R})$Hitchin components by using the Anosov property of elements of ${\rm PSL}_n(\mathbb{R})$Hitchin components and invariants of flags introduced by Fock–Goncharov, which is a parameterization by Euclidian convex polytopes. In this talk, we give an explicit description of Fuchsian loci of a pair of pants by using the Bonahon–Dreyer parameterization. 

7. 
Pointed harmonic volume and its relation to extended Johnson homomorphism 田所勇樹 (木更津工高専) As a natural extension of the period, the pointed harmonic volume for a compact Riemann surface is defined using Chen’s iterated integrals. It captures more detailed information of the complex structure. It is also one of a few explicitly computable examples of complex analytic invariants. We obtain its new value for a certain pointed hyperelliptic curve. An application of the pointed harmonic volume is presented. We explain the relationship between the pointed harmonic volume and first extended Johnson homomorphism on the mapping class group of a pointed oriented closed surface. 

8. 
境界付き多様体上のモース関数の同境群 山本卓宏 (東京学大教育) In this talk, we discuss whether cobordism groups of Morse functions on manifolds with boundary are trivial or not. 

9. 
接分布と同階数ベクトル束の間の束準同型の特異点 土田 旭 (北大理)・佐治健太郎 (神戸大理) We consider singularities of bundle homomorphisms from a tangent distribution and a vector bundle of the same rank. Generic classification of the singularities for low dimensional cases are studied. We also consider a bundle homomorphism which is induced from a Morin map. In the case a distribution is a contact structure, we give a characterization of singularities of the bundle homomorphisms by using the contact Hamiltonian vector field. 

10. 
スワローテイルの $SO(3)$標準形と幾何的模様 佐治健太郎 (神戸大理) We construct a form of swallowtail singularity in $\boldsymbol{R}^3$ which uses coordinate transformations on the source and isometries on the target. As an application, we classify configurations of asymptotic curves and characteristic curves near swallowtail. 

11. 
非球面的曲面における正則閉曲線の回転数について 山崎正之 (岡山理大理) I define a rotation number of a regular closed curve on a complete euclidean/hyperbolic syrface, which, together with the free homotopy class, determines a regular homotopy class. I also give a Whitneytype formula for this rotation number. 

12. 
階層体の圏とSerre–Swanの定理 栗林勝彦 (信州大理)・青木稔樹 Stratifolds are considered from a categorical point of view. We show among others that the category of stratifolds fully faithfully embeds into the category of ${\mathbb R}$algebras as does the category of smooth manifolds. We prove that a variant of the Serre–Swan theorem holds for stratifolds. In particular, the category of vector bundles over a stratifold is shown to be equivalent to the category of vector bundles over an associated affine scheme although the latter is in general larger than the stratifold itself. 

13. 
Higher theories of algebraic structures 松岡拓男 Discovery or recognition of the right kind of algebraic structure is often important in the development of mathematical subjects. In situations where various complex kinds of algebraic structure can arise, special technology for systematically finding and treating algebraic structures would be desirable. In particular, such technology would be necessary for broad application of higher category theory, since algebraic structures of high categorical dimension are varied and can be complicated. We shall describe how concrete understanding of higher categorical coherence leads to a systematic view on some (quite general) kinds of algebraic structure. A consequently found new phenomenon concerning topological field theories is interesting in its contrast to the cobordism hypothesis. 

14. 
バルクエッジ対応と指数のコボルディズム不変性 林 晋 (MathAMOIL) We show that the bulkedge correspondence for twodimensional type A topological insulators follows directly from the cobordism invariance of the index. 

15. 
バルクエッジコーナー対応 林 晋 (MathAMOIL) We consider a translation invariant bounded linear selfadjoint operator (model of a Hamiltonian) on a threedimensional lattice (bulk) and its restrictions onto two subsemigroups (edges) and their intersection (corner). We first show that, if our bulk and edges Hamiltonians have a common spectral gap, we can define a topological invariant for the gapped bulk and edges. We next show a relation between this invariant and another invariant defined for the corner. 

16. 
The space of knots in a manifold and the right operadic module of configuration spaces 森谷駿二 (阪府大) For closed simply connected manifold $M$ of dimension $\geq 4$, we introduce a new spectral sequence converging to the space of knots in $M$. 

17. 
Nonformality of the odd dimensional framed little disks operads 森谷駿二 (阪府大) We prove the odd dimensional framed little disks operads is not formal as a nonsymmetric operad. 

18. 
$n$cube の頂点カット上のトーリック多様体の分類 鍬田英也 (近畿大工高専)・蓮井 翔 (阪府大高等教育)・枡田幹也 (阪市大理)・朴 善正 (阪市大理) A complete nonsingular toric variety (called a toric manifold) is over $P$ if its quotient by the compact torus is homeomorphic to $P$ as a manifold with corners. Bott manifolds are toric manifolds over an $n$cube $I^n$ and blowing them up at a fixed point produces toric manifolds over $\mbox{vc}(I^n)$ an $n$cube with one vertex cut. They are all projective. On the other hand, Oda’s $3$fold, the simplest nonprojective toric manifold, is over $\mbox{vc}(I^3)$. In this paper, we classify toric manifolds over $\mbox{vc}(I^n)$ $(n\ge 3)$ as varieties and as smooth manifolds. It consequently turns out that there are many nonprojective toric manifolds over $\mbox{vc}(I^n)$ but they are all diffeomorphic, and toric manifolds over $\mbox{vc}(I^n)$ in some class are determined by their cohomology rings as varieties. 

19. 
正則半単純なヘッセンバーグ多様体のコホモロジー環について 阿部 拓 (阪市大数学研)・堀口達也 (阪大情報／阪市大数学研)・枡田幹也 (阪市大理) We investigate the cohomology rings of regular semisimple Hessenberg varieties whose Hessenberg functions are of the form $h=(h(1),n\cdots,n)$ in Lie type $A_{n1}$. The main result gives an explicit presentation of the cohomology rings in terms of generators and their relations. Our presentation naturally specializes to Borel’s presentation of the cohomology ring of the flag variety, and it is compatible with the representation of the symmetric group on the cohomology constructed by J. Tymoczko. 

20. 
t分布のシンプレクティック幾何・接触幾何 森 淳秀 (大阪歯大歯) In the previous work, the speaker studied the positive and negative symplectic structures on the space of the pairs of normal distributions and found a Lagrangian submanifold with nice properties. In this talk, we extend this result to the space of the pairs of tdistributions and propose an application concerning the smoothness of the movement of a parameter. 

21. 
Embeddability of the rightangled Artin groups on the complement graphs of linear forests 片山拓弥 (広島大理) In 2011, Sanghyun Kim and Thomas Koberda proved that, for any finite graphs $\Lambda$ and $\Gamma$, a full embedding of $\Lambda$ into the extension graph $\Gamma^e$ of $\Gamma$ gives rise to an embedding between the corresponding rightangled Artin groups, $A(\Lambda) \hookrightarrow A(\Gamma)$. Then the following natural question arises: for which graphs $\Lambda$ and $\Gamma$, can we reduce an embedding $A(\Lambda) \hookrightarrow A(\Gamma)$ into a full embedding $\Lambda \rightarrow \Gamma^e$? Recently, several authors proved that the reduction is impossible for some $\Lambda$ and $\Gamma$. In this talk, we give a positive answer when $\Lambda$ is the complement graph of a linear forest. In addition, we can further reduce an embedding $A(\Lambda) \hookrightarrow A(\Gamma)$ into a full embedding between the defining graphs, $\Lambda \rightarrow \Gamma$, if $\Lambda$ is the complement graph of a linear forest. 

22. 
符号付きトンプソン群の同型問題 加藤本子 (東大数理) Higman–Thompson groups are groups of homeomorphisms of the Cantor space which are locally orientation preserving. They are examples of finitely presented virtually simple groups. Generalizing these groups, Funar and Neretin defined signed Higman–Thompson groups. Signed Higman–Thompson groups are groups of homeomorphisms of the Cantor space which are locally orientation preserving or orientation reversing. In this talk, we give a necessary and sufficient condition for a signed Higman–Thompson group to be isomorphic to one of Higman–Thompson groups. This is based on a joint work with Javier Aramayona and Julio Aroca (Autonomous University of Madrid). 

23. 
Kazhdan’s property (T) and semidefinite programming 小沢登高 (京大数理研) It has been known that Kazhdan’s property (T) is semidecidable and an algorithm to detect property (T) has been proposed. In this talk, I will describe an improved algorithm that exploits the symmetry on the given test group $G$. The improved algorithm makes computer verification of property (T) for certain groups possible otherwise impossible. I will report the result of a largescale calculation. This talk is based on a joint work with M. Kaluba and P. Nowak. 

24. 
On the shadowing and limit shadowing properties 川口徳昭 (東大数理) In this talk, we consider the relation between the shadowing property and the limit shadowing property of topological dynamical systems. We show that for any continuous selfmap $f$ of a compact metric space, if $f$ has the limit shadowing property, then the restriction of $f$ to the nonwandering set satisfies the shadowing property. As an application, we prove the equivalence of the two shadowing properties for equicontinuous maps. 

25. 
3次接触をもつ2次元微分同相写像のmoduli 橋本 忍 (首都大東京理工) We study conjugacy invariants for 2dimensional diffeomorphisms with homoclinic cubic tangencies (twosided tangencies of the lowest order) under certain open conditions. Ordinary arguments used in past studies of conjugacy invariants associated with onesided tangencies do not work in the twosided case. In this talk, we will present a new method which is applicable to the twosided case. 

26. 
位相的エントロピーとリアプノフ指数の関係 平出耕一 (愛媛大理)・松岡千博 (阪市大工) In this talk we discuss the relationship between topological entropy and Lyapunov exponents, provided that the Pesin entropy formula holds, and mention some results by experimental mathematics. 

27. 
Questions on monotone operators for vectorvalued maps 山﨑薫里 (高崎経大経済) Answering a question of Yang, we show that, for an ordered topological vector space $Y$ with positive interior points, if each nonzero positive element is an order unit, then $Y$ is isomorphic to the real line. We also provide a technique which reduces some vectorvalued results to the original realvalued ones by using some Minkowski functionals. 

28. 
Three embeddings and their implications in products of generalized metric spaces 矢島幸信 (神奈川大工)・平田康史 (神奈川大工) We discuss when $C^*$embedding or $C$embedding implies $P$embedding in products of generalized metric spaces, such as $M$spaces, $\Sigma$spaces and semistratifiable spaces. 

29. 
Achiral 1cusped hyperbolic 3manifolds not coming from amphicheiral nullhomologous knot complements 鄭 仁大 (近畿大理工)・市原一裕 (日大文理)・谷山公規 (早大教育) It is experimentally known that achiral hyperbolic 3manifolds are quite sporadic at least among those with small volume, while we can find plenty of them as amphicheiral knot complements in the 3sphere. In this talk, we show that there exist infinitely many achiral 1cusped hyperbolic 3manifolds not homeomorphic to any amphicheiral nullhomologous knot complement in any closed achiral 3manifold. 

30. 
対掌矯飾的手術とキャッソン不変量 市原一裕 (日大文理)・伊藤哲也 (阪大理)・斎藤敏夫 (上越教育大) I will report on our recent study of chirally cosmetic surgery, that is, a pair of Dehn surgeries on a knot producing homeomorphic 3manifolds with opposite orientations. Several constraints on knots and surgery slopes to admit such surgeries are given. Our main ingredients are the original and the $SL(2,C)$ version of Casson invariants. As an application, we give a complete classification of chirally cosmetic surgeries on two bridge knots of genus one. 

31. 
双曲的ファイバー二橋絡み目補空間の標準的分割の veering 構造 阪田直樹 (広島大理) Epstein–Penner has proved that each finitevolume cusped complete hyperbolic manifold admits a canonical decomposition into ideal polyhedra. I proved that the canonical decompositions of hyperbolic fibered twobridge link complements are layered with respect to the fiber structures. On the other hand, Agol has shown that every pseudoAnosov mapping torus of a surface, punctured along the singular points of the stable and unstable foliations, admits a canonical “veering” layered triangulation. In this talk, we completely determine, for each hyperbolic fibered twobridge link, whether the canonical decomposition of its complement is veering with respect to the fiber structure. 

32. 
タングルの貼り合わせにおける双曲性 吉田建一 (京大理) Let us glue a 3manifold and the complement of a trivial tangle along bounding 4punctured spheres. We propose that this construction can be regarded as an analogue of a Dehn filling. We will show an analogous result for Thurston’s hyperbolic Dehn surgery theorem. 

33. 
Height, trunk and representativity of knots R. Blair (California State Univ.)・小沢 誠 (駒澤大総合) In this talk, we investigate three geometrical invariants of knots, the height, the trunk and the representativity. First, we give a counterexample for the conjecture which states that the height is additive under connected sum of knots. Next, we show that the representativity is bounded above by a half of the trunk. We also define the trunk of a tangle and show that if a knot has an essential tangle decomposition, then the representativity is bounded above by half of the trunk of either of the two tangles. Finally, we remark on the difference among Gabai’s thin position, ordered thin position and minimal critical position. We also give an example of a knot which bounds an essential nonorientable spanning surface, but has arbitrarily large representativity. 

34. 
The incompatibility of crossing number and bridge number for knot diagrams R. Blair (California State Univ.)・A. A. Kjuchukova (Univ. of Pennsylvania)・小沢 誠 (駒澤大総合) We define and compare several natural ways to compute the bridge number of a knot diagram. We study bridge numbers of crossing number minimizing diagrams, as well as the behavior of diagrammatic bridge numbers under the connected sum operation. For each notion of diagrammatic bridge number considered, we find crossing number minimizing knot diagrams which fail to minimize bridge number. Furthermore, we construct a family of minimal crossing diagrams for which the difference between diagrammatic bridge number and the actual bridge number of the knot grows to infinity. 

35. 
A pair of Seifert matrices that cannot have algebraic Gordian distance one Jie Chen (東北大情報) Murakami introduced the Gordian distance as the least crossingchanges to transform one knot into another. Based on a matrix operation analogous to the crossingchange, he also introduced the algebraic Gordian distance between Seifert matrices. We consider the restrictions when the algebraic Gordian distance is one and improve a result of Kawauchi that if two matrices have algebraic Gordian distance one, then their Alexander polynomials have a certain relation. We give new answers to a question of Jong, showing that some Alexander polynomials cannot be realized by distance one matrices if a corresponding quadratic equation does not have an integer solution. 

36. 
Brieskornホモロジー$3$球面の$\mathit{SL}(2;\mathbb{C})$既約表現のReidemeister torsionについて 北野晃朗 (創価大理工) Let $M=\Sigma(a_1,a_2,a_3)$ be a Brieskorn homology $3$sphere. Here $2\leq a_1<a_2<a_3$ are pairwise coprime integers. Further we suppose that $a_1=2$, or $a_1,a_2,a_3$ are odd integers. We write $\tau_\rho(M)$ to Reidemeister torsion of $M$ for an irreducible representation $\rho:\pi_1(M)\rightarrow \mathit{SL}(2;\mathbb{C})$. Now we consider the set $RT(M)=\{\tau_\rho(M)\}\subset \mathbb{R}$ of all values, which is a finite set of real numbers. In this talk, we would like to discuss the problem that how strong $RT(M)$ is as an invariant for Brieskorn homology $3$spheres and show $RT(M)$ determines $M$. 

37. 
立方複体を用いた交代絡み目外部空間の特徴付け 坂井駿介 (広島大理) Recently, J. Greene and J. Howie gave intrinsic characterizations of alternating links in terns of a pair of definite spanning surfaces. These answer the Fox problem which asked what nondiagrammatic properties characterize alternating links. In this talk, we give a characterization of alternating link exteriors in terms of cubed complexes. 

38. 
セパタクロー絡み目について 松田能文 (青学大理工) We call the link obtained from a ball of sepaktakraw by replacing each annulus piece with a circle the sepatakraw link. The sepaktakraw link is an alternating link with rich symmetry. In this talk, we introduce sevearl properties of the sepaktakraw link. 

39. 
On equivalence classes of spherical curves by deformations of types RI and RI\!I\!I 伊藤 昇 (東大数理)・橋爪 惠 (明大研究・知財) Let $P,P^{\prime}$ be spherical curves. Suppose that $P,P^{\prime}$ are reduced spherical curves. Then the following conditions are piarwise equivalent. (A) $ P^{\prime}$ is obtained from $P$ by applying a sequence of deformations of RI, RI\!I\!I and ambient isotopy. (B) $ P^{\prime}$ is obtained from $P$ by applying a sequence deformations of RI\!I\!I, $\alpha$, $\beta$ and ambient isotopy. 

40. 
Finite type invariants and nsimilarity of virtual knots by forbidden moves 伊藤 昇 (東大数理)・櫻井みぎ和 (茨城工高専) Vassiliev introduced filtered invariants of knots using crossing changes (1990), called finite type invariants. For the finite type invariants, Ohyama introduced a notion of ntriviality (1990) and Taniyama generalized it to obtain a notion of nsimilarity (1992). Goussarov, Polyak, and Viro introduced universal finite type invariants of virtual knots using virtualization (2000). We mimicked their ideas, and defined finite type invariants of virtual knots and introduced a notion that corresponds to nsimilarity, using forbidden moves (J. Math. Soc. Japan). In this talk, we give infinitely many examples of nsimilar pairs of virtual knots by forbidden moves and show that every invariant of Goussarov, Polyak, and Viro is an invariant of us. 

41. 
$C_n$move on long virtual knot and Goussarov–Polyak–Viro’s finite type invariant 小鳥居祐香 (理化学研) A $C_n$move is a family of local moves on knots and links, which gives a topological characterization of finite type invariants of knots. We extend the $C_n$move to (long) virtual knots by using the lower central series of the pure virtual braid, and call it a virtual $C_n$move. We then prove that for long virtual knots a virtual $C_n$equivalence generated by virtual $C_n$moves is equal to $n$equivalence, which is an equivalence relation on (long) virtual knots defined by Goussarov–Polyak–Viro. Moreover we directly prove that two long virtual knots are not distinguished by any finite type invariants of degree $n1$ if they are virtual $C_n$equivalent, for any positive integer $n$. 

42. 
3成分ハンドル体絡み目のHLhomotopy 類について 水澤篤彦 Two handlebodylinks are HLhomotopic if they are transformed from one to the other by a sequence of selfcrossing changes of their handles. For 3component handlebodylinks, we construct a bijection between the set of the HLhomotopy classes and the set of the equivalence classes of the set of tuples of one 3dimensional matrix and three matrices with respect to some relations. 

43. 
Dijkgraaf–Witten invariants of cusped hyperbolic 3manifolds 木村直記 (早大理工) The Dijkgraaf–Witten invariant is a topological invariant for compact oriented 3manifolds in terms of a finite group and its 3cocycle. The invariant is a state sum invariant constructed by using a triangulation, likewise the Turaev–Viro invariant. In this talk, we discuss an extention of the Dijkgraaf–Witten invariants to cusped 3manifolds. We show that the Dijkgraaf–Witten invariants distinguish some pairs of orientable cusped hyperbolic 3manifolds with the same hyperbolic volumes and Turaev–Viro invariants. We also give an example of a pair of cusped hyperbolic 3manifolds with the same hyperbolic volumes and homology groups, meanwhile with the distinct Dijkgraaf–Witten invariants. 

44. 
A $q$series identity via the $\mathfrak{sl}_3$ colored Jones polynomials for the $(2,2m)$torus link 湯淺 亘 (東工大理) The colored Jones polynomial is a $q$polynomial invariant of links colored by irreducible representations of a simple Lie algebra. A $q$series called the tail of a knot $K$ is obtained as the limit of the $\mathfrak{sl}_2$ colored Jones polynomials $\{J_n(K;q)\}_n$ ($n\to\infty$). We give two explicit formulae of the tail of the $\mathfrak{sl}_3$ colored Jones polynomials colored by $(n,0)$ for the $(2,2m)$torus link. These two expressions of the tail derive Andrews–Gordon identities for the $\mathfrak{sl}_3$ false theta function. 

45. 
The $\mathfrak{sl}_3$ colored Jones polynomials for $2$bridge links 湯淺 亘 (東工大理) Kuperberg introduced web spaces for some Lie algebras which are generalizations of the Kauffman bracket skein module on a disk. We derive some formulas for $A_1$ and $A_2$ clasped web spaces by graphical calculus using skein theory. These formulae are colored version of the skein relation, a twist formula, and a bubble skein expansion formula. We calculate the $\mathfrak{sl}_2$ and $\mathfrak{sl}_3$ colored Jones polynomials of $2$bridge knots and links explicitly using the twist formula. 

46. 
多重共役カンドル彩色数と多重共役バイカンドル彩色数の関係 村尾 智 (筑波大数理物質) We define a functor $\mathcal{Q}$ from the category of multiple conjugation biquandles to that of multiple conjugation quandles. We show that for any multiple conjugation biquandle $X$, there is a onetoone correspondence between the set of $X$colorings and that of $\mathcal{Q}(X)$colorings diagrammatically for any handlebodylink and spatial trivalent graph. 

47. 
$\mathbb{Z}$彩色可能絡み目の最小彩色数 松土恵理 (日大総合基礎) The minimal coloring number of a $\mathbb{Z}$colorable link is the minimal number of colors for nontrivial $\mathbb{Z}$colorings on diagrams of the link. We determine the minimal coloring number for any $\mathbb{Z}$colorable links. 

48. 
$(2, 3, 2n + 1)$プレッツェル結び目の ねじれアレキサンダー多項式 阿蘇愛理 (首都大東京理工) We calculate the twisted Alexander polynomials of $(2,3,2n+1)$pretzel knots associated to their holonomy representations. 