Doctor of Philosophy, The University of Tokyo

Geometry, topological combinatorics, algebraic topology, geometric group theory

Dominance complexes, neighborhood complexes and combinatorial Alexander duals
Takahiro Matsushita; Shun Wakatsuki
Journal of Combinatorial Theory, Series A, 211, 105978-105978, Apr. 2025, Refereed, Not invited
Lead

The space of non-extendable quasimorphisms
Morimichi Kawasaki; Mitsuaki Kimura; Shuhei Maruyama; Takahiro Matsushita; Masato Mimura
Algebraic & Geometric Topology, to appear, Mar. 2024, Refereed, Not invited
Lead

Independence complexes of $(n \times 6)$-grid graphs
Takahiro Matsushita; Shun Wakatsuki
Homology, Homotopy and Applications, 26(1), 15-27, Jan. 2024, Refereed
Lead

Van Kampen–Flores theorem for cell complexes
Daisuke Kishimoto; Takahiro Matsushita
Discrete & Computational Geometry, Sep. 2023, Refereed, Not invited
Lead

Invariant quasimorphisms for groups acting on the circle and non-equivalence of SCL
Shuhei Maruyama; Takahiro Matsushita; Masato Mimura
Israel Journal of Mathematics, to appear, Sep. 2023, Refereed, Not invited
Lead

Van Kampen-Flores theorem and Stiefel-Whitney classes
Daisuke Kishimoto; Takahiro Matsushita
Proceedings of the American Mathematical Society, to appear, Aug. 2023, Refereed, Not invited
Lead

Independence complexes of (n × 4) and (n × 5)-grid graphs
Takahiro Matsushita; Shun Wakatsuki
Topology and its Applications, 334, 108541-108541, Jul. 2023, Refereed, Not invited
Lead

Mixed commutator lengths, wreath products and general ranks
Morimichi Kawasaki; Mitsuaki Kimura; Shuhei Maruyama; Takahiro Matsushita; Masato Mimura
Kodai Mathematical Journal, 46(2), 145-183, Jun. 2023, Refereed
Lead

Commuting symplectomorphisms on a surface and the flux homomorphism
Morimichi Kawasaki; Mitsuaki Kimura; Takahiro Matsushita; Masato Mimura
Geometric and Functional Analysis, 33(5), 1322-1353, Jun. 2023, Refereed, Not invited
Lead

Dominance complexes and vertex cover numbers of graphs
Takahiro Matsushita
Journal of Applied and Computational Topology, 7(2), 363-368, Dec. 2022, Refereed, Not invited
Lead

Matching complexes of polygonal line tilings
Takahiro Matsushita
Hokkaido Mathematical Journal, 51(3), 339-359, Oct. 2022, Refereed, Not invited
Lead

Bavard’s duality theorem for mixed commutator length
Morimichi Kawasaki; Mitsuaki Kimura; Takahiro Matsushita; Masato Mimura
L’Enseignement Mathématique, 68(3), 441-481, Jul. 2022, Refereed, Not invited
Lead

Jacobi identity in polyhedral products
Daisuke Kishimoto; Takahiro Matsushita; Ryusei Yoshise
Topology and its Applications, 312, 108079-108079, May 2022, Refereed, Not invited
Lead

Neighborhood complexes and Kronecker double coverings
Takahiro Matsushita
Osaka Journal of Mathematics, 58(3), 637-645, Jul. 2021, Refereed, Not invited
Lead

Relative phantom maps and rational homotopy
Daisuke Kishimoto; Takahiro Matsushita
Proceedings of the American Mathematical Society, 149(9), 4029-4040, Jun. 2021, Refereed, Not invited
Lead

Graphs whose Kronecker covers are bipartite Kneser graphs
Takahiro Matsushita
Discrete Mathematics, 344(4), 112264-112264, Apr. 2021, Refereed, Not invited
Lead

Matching complexes of small grids
Takahiro Matsushita
The Electronic Journal of Combinatorics, 26(3), Jul. 2019, Refereed, Not invited
Lead

Z_2-Indices and Hedetniemi’s Conjecture
Takahiro Matsushita
Discrete & Computational Geometry, 62(3), 662-673, Apr. 2019, Refereed, Not invited
Lead

Relative phantom maps
Kouyemon Iriye; Daisuke Kishimoto; Takahiro Matsushita
Algebraic & Geometric Topology, 19(1), 341-362, Feb. 2019, Refereed, Not invited
Lead

Homotopy types of the Hom complexes of graphs
Takahiro Matsushita
European Journal of Combinatorics, 63, 216-226, Jun. 2017, Refereed, Not invited
Lead

Box complexes and homotopy theory of graphs
Takahiro Matsushita
Homology, Homotopy and Applications, 19(2), 175-197, 2017, Refereed, Not invited
Lead

Fundamental groups of neighborhood complexes
Takahiro Matsushita
Journal of Mathematical Sciences, The University of Tokyo, 24, 321-353, 2017, Refereed, Not invited
Lead

Some examples of non-tidy spaces
Takahiro Matsushita
Mathematical Journal of Okayama University, 59(1), 21-25, 2017, Refereed, Not invited
Lead

MORPHISM COMPLEXES OF SETS WITH RELATIONS
Takahiro Matsushita
OSAKA JOURNAL OF MATHEMATICS, 53(1), 267-283, Jan. 2016, Refereed, Not invited
Lead

Answers to some problems about graph coloring test graphs
Takahiro Matsushita
European Journal of Combinatorics, 45, 59-64, Apr. 2015, Refereed, Not invited
Lead

MORPHISM COMPLEXES OF SETS WITH RELATIONS
Takahiro Matsushita

Survey on invariant quasimorphisms and stable mixed commutator length
Morimichi Kawasaki; Mitsuaki Kimura; Shuhei Maruyama; Takahiro Matsushita; Masato Mimura
Topology proceedings, 64, 129 - 174, 28 Jun. 2024, Refereed, Invited
Lead

Invariant quasimorphisms and mixed commutator lengths
Takahiro Matsushita
日本数学会2022年度年会 特別講演予稿集, Mar. 2022, Invited
Lead, Corresponding

Graphs whose Kronecker double coverings are bipartite Kneser graphs
Takahiro Matsushita
第37回代数的組合せ論シンポジウム報告集, 81 - 90, 2021, Invited
Lead

Hom comlexes of graphs and chromatic numbers
Takahiro Matsushita
第63回トポロジーシンポジウム予稿集, 35 - 44, Jul. 2016, Invited
Lead, Corresponding

Box complexes and Kronecker double coverings (New topics of transformation groups)
Matsushita Takahiro
RIMS Kokyuroku, 1968, 66 - 75, Nov. 2015
Lead

The topology of box complexes and the chromatic numbers of graphs (Intelligence of Low-dimensional Topology)
松下 尚弘
数理解析研究所講究録, 1911, 34 - 47, Aug. 2014
Lead

Fundamental groups of neighborhood complexes
Takahiro Matsushita
第60回トポロジーシンポジウム予稿集, 11 - 20, Aug. 2013, Invited
Lead

Matching complexes of mall grids
松下尚弘
微分空間・トポロジーと組み合わせ構造, Dec. 2019, Invited

Relative phantom maps
Takahiro Matsushita
The Third Pan-Pacific International Conference on Topology and Applications, Nov. 2019, Invited

Relative phantom maps and rational homotopy
Takahiro Matsushita
Homotopy Theory Symposium, Oct. 2019, Invited

小さなグリッドグラフのマッチング複体のホモトピー型について
松下尚弘
トポロジー金曜セミナー, Jun. 2019, Invited

Fundamental groups of neighborhood complexes
Takahiro Matsushita
The 5-th workshop on Geometric Group Theory, Mar. 2019, Invited

空間対の幽霊写像に対する Gray 指数について
松下尚弘
ホモトピー論シンポジウム 2018, Nov. 2018, Not invited

Relative phantom maps
Takahiro Matsushita
Mapping spaces in algebraic topology, Aug. 2018, Invited

Relative phantom maps
松下尚弘
2017年度ホモトピー論シンポジウム, Nov. 2017, Not invited

Relative phantom maps
松下尚弘
代数トポロジーセミナー（京都大学）, Nov. 2017, Invited

Indices of Z2-spaces and Hedetniemi's conjecture
松下尚弘
信州大学トポロジーセミナー, Oct. 2017, Invited

Box complexes and model structures on the category of graphs
Takahiro Matsushita
Young researchers in homotopy theory and toric topology, Aug. 2017, Invited

Fundamental groups of neighborhood complexes
松下尚弘
変換群を核とする代数的位相幾何学, May 2017, Invited

同変写像のグラフ準同型による近似
松下尚弘
トポロジー金曜セミナー（九州大学）, Apr. 2017, Invited

Phantom map について
松下尚弘
第３回若手代数トポロジーワークショップ, Mar. 2017, Invited

Hom complexes of graphs
松下尚弘
第７回（非）可換代数とトポロジー, Feb. 2017, Not invited

On the universality problem of Hom complexes of graphs
松下尚弘
2016年度ホモトピー論シンポジウム, Nov. 2016, Not invited

グラフの彩色数と Hom 複体について
松下尚弘
組合せ論サマースクール2016, Aug. 2016, Not invited

近傍複体の基本群について
松下尚弘
学習院トポロジーセミナー, Jul. 2016, Invited

グラフの Hom 複体と彩色数について
松下尚弘
第63回トポロジーシンポジウム, Jul. 2016, Invited

Box complex and a model structure of the category of graphs
Takahiro Matsushita
The 6th East Asian Conference of Algebraic Topology, Dec. 2015, Invited

Hom 複体が与えるグラフの彩色数の下界について
松下尚弘
第42回変換群論シンポジウム, Nov. 2015, Invited

Hom 複体が与えるグラフの彩色数の下界について
松下尚弘
2015年度ホモトピー論シンポジウム, Nov. 2015, Not invited

箱複体に関するグラフの圏のモデル構造について
松下尚弘
Algebraic Topology from Combinatorial Viewpoint, Nov. 2015, Invited

箱複体に関するグラフの圏のモデル構造について
松下尚弘
信州大学トポロジーセミナー, Sep. 2015, Invited

Box complexes and model structures on the category of graphs
松下尚弘
トポロジー火曜セミナー, Jun. 2015, Invited

箱複体とクロネッカー二重被覆について
松下尚弘
RIMS研究集会「新しい変換群論の幾何」, May 2015, Invited

Box complexes and Kronecker double coverings of graphs
Takahiro Matsushita
Low-dimensional topology and number theory VII, Mar. 2015, Invited

Some examples of non-tidy spaces
Takahiro Matsushita
代数トポロジーセミナー（京都大学）, Feb. 2015, Invited

箱複体とグラフの Kronecker 被覆について
松下尚弘
東工大トポロジーセミナー, Jan. 2015, Invited

Box complexes and chromatic numbers of graphs
Takahiro Matsushita
Workshop and Seminar on Topological Combinatorics, Jan. 2015, Invited

Fundamental groups of neighborhood complexes
松下尚弘
2014年度ホモトピー論シンポジウム, Nov. 2014, Not invited

箱複体のトポロジーと染色数について
松下尚弘
組合せ数学セミナー, Oct. 2014, Invited

近傍複体のトポロジーと染色数について
松下尚弘
日本数学会2014年度秋季会, Sep. 2014, Not invited

The simplicial sets related to the Hom complexes of graphs
松下尚弘
日本数学会2014年度秋季会, Sep. 2014, Not invited

Box complex and the chromatic number of graphs
松下尚弘
代数トポロジーセミナー（京都大学）, Jul. 2014, Invited

The topology of box complexes and the chromatic numbers of graphs
Takahiro Matsushita
Intelligence of low-dimensional topology 2014, May 2014, Invited

グラフの r-基本群と r-被覆写像について
松下尚弘
代数トポロジーセミナー, May 2014, Invited

グラフのr-基本群とr-被覆写像について
松下尚弘
信州大学トポロジーセミナー, Mar. 2014, Invited

グラフの被覆写像と基本群の理論
松下尚弘
筑波大学トポロジーセミナー, Jun. 2013, Invited

近傍複体の基本群について
松下尚弘
2013年度日本数学会年会, Mar. 2013, Not invited