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Researcher DataBase - Personal Information :
Hosaka Tetsuya
Hosaka Tetsuya
Associate Professor
College of Science - Division of Mathematics
Faculty of Science - Department of Mathematics
Graduate School of Integrated Science and Technology Department of Science - Mathematics Course
Graduate School of Science and Technology,Research Division - Research of Basic Science
hosaka.tetsuya@@@shizuoka.ac.jp
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Last updated : 2025/03/11 2:05:10
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Basic information on teaching staff
University of Tsukuba 2001/3 |
Natural Science - Geometry Natural Science - Algebra |
Geometric group theory Geometry and reflections Graph theory Topics on mathematics |
Research on Coxeter groups Research on reconstructible graphs Research on reflection groups of geodesic spaces |
Geometric group theory, Graph theory, Coxeter groups, reflection groups, CAT(0) groups and CAT(0) spaces, discrete groups |
Research information
[1]. The Reconstruction Conjecture for finite simple graphs and associated directed graphs Discrete Mathematics 345/7 1-20 112893 (2022) [Refereed] refereed [Internationally co-authored papers] non-internationally co-authored paper [Lead author or co-author] author [Author] Tetsuya Hosaka [URL] [DOI] [2]. Hyperbolic right-angled Coxeter groups with boundaries as a Sierpiński carpet and a Menger curve Topology and its Applications 260/ 70-85 (2019) [Refereed] refereed [Internationally co-authored papers] non-internationally co-authored paper [Lead author or co-author] co-author [Author] Naotsugu Chinen; Tetsuya Hosaka [URL] [DOI] [3]. Reconstructible graphs, simplicial flag complexes of homology manifolds and associated right-angled Coxeter groups Osaka Journal of Mathematics 52/4 1173-1180 (2015) [Refereed] refereed [Internationally co-authored papers] non-internationally co-authored paper [Lead author or co-author] author [Author] Tetsuya Hosaka [URL] [4]. On equivariant homeomorphisms of boundaries of CAT(0) groups and Coxeter groups Differential Geometry and its Applications 43/ 68-94 (2015) [Refereed] refereed [Internationally co-authored papers] non-internationally co-authored paper [Lead author or co-author] author [Author] Tetsuya Hosaka [URL] [DOI] [5]. Erratum to "Asymptotic dimension and boundary dimension of proper CAT(0) spaces'' Tsukuba Journal of Mathematics 39/1 165- 166 (2015) [Refereed] refereed [Internationally co-authored papers] non-internationally co-authored paper [Lead author or co-author] co-author [Author] Naotsugu Chinen; Tetsuya Hosaka [Notes] 論文全体を共同で執筆した [URL]
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[1]. グラフの再構成可能予想と関連付けられた有向グラフについて 静岡複素解析幾何セミナー (2020/12/23) other [Presenter]保坂 哲也 [URL of the repository, etc.] [Notes] 場所:静岡大学理学部C309
世話人:足立真訓先生 [2]. Coxeter群の同型問題の周辺と幾何的な視点の紹介II 第26回沼津改め静岡研究会---幾何,数理物理,そして量子論--- (2019/3/8) other [Presenter]保坂 哲也 [Notes] 場所:静岡大学理学部C309
世話人:待田芳徳先生,保坂哲也,足立真訓先生,高橋雅朋先生 [3]. Coxeter群の同型問題の周辺と幾何的な視点の紹介 第25回沼津改め静岡研究会---幾何,数理物理,そして量子論--- (2018/3/) other [Presenter]保坂 哲也 [URL of the repository, etc.] [Notes] 場所:静岡大学理学部C309
世話人:待田芳徳先生,保坂哲也,高橋雅朋先生 [4]. 有限生成無限Coxeter群の分類問題とtwist-rigidの紹介 早稲田双曲幾何幾何学的群論セミナー (2017/7/) other [Presenter]保坂 哲也 [URL of the repository, etc.] [Notes] 場所:早稲田大学教育学部
主催者:小森洋平先生 [5]. 測地空間の離散鏡映群とCoxeter群について 早稲田双曲幾何幾何学的群論セミナー (2017/7/) other [Presenter]保坂 哲也 [URL of the repository, etc.] [Notes] 場所:早稲田大学教育学部
主催者:小森洋平先生
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[1]. 群の作用する非正曲率空間および無限コクセター群と有限グラフの研究 ( 2018/4 ~ 2022/3 ) Grant-in-Aid for Scientific Research (C) leader [Notes] 2018年度~2021年度
総額:2080千円
2018年度:650千円 (直接経費:500千円, 間接経費:150千円)
2019年度:390千円 (直接経費:300千円, 間接経費: 90千円)
2020年度:650千円 (直接経費:500千円, 間接経費:150千円)
2021年度: [2]. 非正曲率空間とその等長変換群およびコクセター群の研究 ( 2013/4 ~ 2017/3 ) Grant-in-Aid for Young Scientists (B) leader [Notes] 2013年度~2017年度
総額:4160千円
2013年度:1170千円 (直接経費:900千円, 間接経費:270千円)
2014年度:1170千円 (直接経費:900千円, 間接経費:270千円)
2015年度:910千円 (直接経費:700千円, 間接経費:210千円)
2016年 [3]. 群作用のある非正曲率空間およびコクセター群の研究 ( 2009/4 ~ 2013/3 ) Grant-in-Aid for Young Scientists (B) leader [Notes] 2009年度~2012年度
総額:4290千円
2009年度:1300千円 (直接経費:1000千円, 間接経費:300千円)
2010年度:1170千円 (直接経費:900千円, 間接経費:270千円)
2011年度:910千円 (直接経費:700千円, 間接経費:210千円)
2012 |
[1]. (2004/9)
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[1]. 第26回沼津改め静岡研究会---幾何,数理物理,そして量子論--- (2019/3) [Role at conference, etc.] other [Site of conference, etc.] 静岡大学理学部C309 [Notes] 平成30年3月6日(水)14:00~3月8日(金)15:20
会場:静岡大理C309
世話人:待田芳徳先生,保坂哲也,足立真訓先生,高橋雅朋先生 [2]. 第25回沼津改め静岡研究会---幾何,数理物理,そして量子論--- (2018/3) [Role at conference, etc.] other [Site of conference, etc.] 静岡大学理学部C309 [Notes] 平成30年3月6日(火)14:00~3月8日(木)15:20
会場:静岡大理C309
世話人:待田芳徳先生,保坂哲也,高橋雅朋先生
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Education related information
[1]. Faculty Course 線型代数学Ⅰ (2024(FY) - first semester ) [Notes] 主担当. 受講者数41名. [2]. Faculty Course 位相数学Ⅰ (2024(FY) - second semester ) [Notes] 主担当. 受講者数32名. [3]. Graduate School Course(Master's) 幾何系特論 (2024(FY) - first semester ) [Notes] 主担当. 受講者数6名. [4]. Faculty Course 数学Ⅲ(微分積分B) (2024(FY) - second semester ) [Notes] 主担当. 受講者数73名. [5]. Faculty Course 数学Ⅰ(微分積分A) (2024(FY) - first semester ) [Notes] 主担当. 受講者数75名.
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2024(FY) Number of undergraduate students(junior students) 0 Number of undergraduate students(senior students) 6 Number of master's course students : 0 Number of doctorate course students (main advisor) : 0 Number of doctorate course students (assistant advisor) : 0 [Notes] 学部4年生の卒業研究学生のうち留学生1名(9月卒業). 2023(FY) Number of undergraduate students(junior students) 0 Number of undergraduate students(senior students) 4 Number of master's course students : 1 Number of doctorate course students (main advisor) : 0 Number of doctorate course students (assistant advisor) : 0 [Notes] 修士1名が9月修了. 2022(FY) Number of undergraduate students(junior students) 0 Number of undergraduate students(senior students) 5 Number of master's course students : 2 Number of doctorate course students (main advisor) : 0 Number of doctorate course students (assistant advisor) : 0 2021(FY) Number of undergraduate students(junior students) 0 Number of undergraduate students(senior students) 4 Number of master's course students : 3 Number of doctorate course students (main advisor) : 0 Number of doctorate course students (assistant advisor) : 0 2020(FY) Number of undergraduate students(junior students) 0 Number of undergraduate students(senior students) 6 Number of master's course students : 1 Number of doctorate course students (main advisor) : 0 Number of doctorate course students (assistant advisor) : 0
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Contributions to society
[1]. lecture meeting サイエンスカフェin静岡・講演 (2024.5.23) (2024/5 ) [Details] サイエンスカフェin静岡で講演「三角形の鏡映による敷き詰めから鏡映群とコクセター群へ」 (2024.5.23) [Notes] B-nest静岡市産学交流センター ペガサート6階プレゼンテーションルーム / 2024.5.23 [2]. lecture meeting サイエンスカフェin静岡・講演 (H29.11.30) (2017/11 ) [Details] サイエンスカフェin静岡で講演「三角形の鏡映による敷き詰めからコクセター群へ」 (H29.11.30) [Notes] B-nest静岡市産学交流センター ペガサート6階プレゼンテーションルーム / H29.11.30 |
International contributions
Others