Sakai Hiroshi 酒井拓史

… Alternative Names

Researcher Number	70468239
Affiliation (Current)	2020: 神戸大学, システム情報学研究科, 准教授
Affiliation (based on the past Project Information) *help	2020: 神戸大学, システム情報学研究科, 准教授 2018: 神戸大学, システム情報学研究科, 准教授 2016: 神戸大学, 大学院システム情報学研究科, 准教授 2015: 神戸大学, システム情報学研究科, 准教授 2013: 神戸大学, システム情報学研究科, 准教授 … More
Review Section/Research Field	Principal Investigator General mathematics (including Probability theory/Statistical mathematics) / Basic Section 12030:Basic mathematics-related Except Principal Investigator General mathematics (including Probability theory/Statistical mathematics) / Foundations of mathematics/Applied mathematics / Basic Section 12030:Basic mathematics-related
Keywords	Principal Investigator 公理的集合論 / 反映原理 / 巨大基数公理 / 無限組み合わせ論 / 国際情報交換 / 国際研究者交流 / 多国籍 / 基数算術 / 巨大基数 Except Principal Investigator 数学基礎論 … More

Toward a solution of the Continuum Problem from the point of view of %% set-theoretic multiverseOngoing
- Principal Investigator
  
  渕野昌
- Project Period (FY)
  2020 – 2023
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 12030:Basic mathematics-related
- Research Institution
  Kobe University
Higher analogies of reflection principles and cardinal arithmeticPrincipal InvestigatorOngoing
- Principal Investigator
  
  酒井拓史
- Project Period (FY)
  2018 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 12030:Basic mathematics-related
- Research Institution
  Kobe University
Research toward a solution of Galvin's conjecture
- Principal Investigator
  
  Fuchino Sakae
- Project Period (FY)
  2014 – 2015
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Foundations of mathematics/Applied mathematics
- Research Institution
  Kobe University
Invariant structures on medium-size infinite cardinals
- Principal Investigator
  
  YOSHINOBU YASUO
- Project Period (FY)
  2012 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  General mathematics (including Probability theory/Statistical mathematics)
- Research Institution
  Nagoya University
On reflection principles at small uncountable cardinalsPrincipal Investigator
- Principal Investigator
  
  SAKAI Hiroshi
- Project Period (FY)
  2011 – 2013
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  General mathematics (including Probability theory/Statistical mathematics)
- Research Institution
  Kobe University
Reflection principles on stationarity and possible extensions of the axiom system of set thoery
- Principal Investigator
  
  FUCHINO Sakae
- Project Period (FY)
  2009 – 2011
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  General mathematics (including Probability theory/Statistical mathematics)
- Research Institution
  Kobe University
Combinatorics on medium-sized infinite cardinals
- Principal Investigator
  
  YASUO Yoshinobu (YOSHINOBU Yasuo)
- Project Period (FY)
  2008 – 2011
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  General mathematics (including Probability theory/Statistical mathematics)
- Research Institution
  Nagoya University

All 2019 2018 2015 2013 2012 2011 Other

All Journal Article Presentation

[Journal Article] On the existence of skinny stationary subsets2019
- Author(s)
  Yo Matsubara, Hirosh Sakai, Toshimichi Usuba
- Journal Title
  
  Annals of Pure and Applied Logic
  
  Volume: 170 Pages: 539-557
- DOI
  10.1016/j.apal.2018.12.003
- NAID
  120006604682
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18K03397, KAKENHI-PROJECT-18K03403, KAKENHI-PROJECT-18K03404
[Journal Article] Stationary reflection principles and two cardinal tree properties2015
- Author(s)
  Hiroshi Sakai and Boban Velickovic
- Journal Title
  
  Journal of the Institute of Mathematics of Jussieu
  
  Volume: 掲載確定 Pages: 69-85
- DOI
  10.1017/s1474748013000315
- NAID
  120005848133
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23740076, KAKENHI-PROJECT-26610040
[Journal Article] Simple proofs of SCH from reflection principles without using better scales2015
- Author(s)
  Hiroshi Sakai
- Journal Title
  
  Archive for Mathematical Logic
  
  Volume: 54 Pages: 639-647
- DOI
  10.1007/s00153-015-0432-0
- NAID
  120005848132
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26610040
[Journal Article] Reflection and indescribability in the constructible universe2015
- Author(s)
  Joan Bagaria, Menachem Magidor, and Hiroshi Sakai
- Journal Title
  
  Israel Journal of Mathematics
  
  Volume: 208 Pages: 1-11
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26610040
[Journal Article] Reflection and indescribability in the constructible universe2015
- Author(s)
  Joan Bagaria, Hiroshi Sakai and Menachem Magidor
- Journal Title
  
  Israel Journal of Mathematics
  
  Volume: 未定
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26610040
[Journal Article] Chang's conjecture and weak square2013
- Author(s)
  Hiroshi Sakai
- Journal Title
  
  Archive for Mathematical Logic
  
  Volume: 52
- DOI
  10.1007/s00153-012-0305-8
- NAID
  120005367491
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] Chang's conjecture and weak square2013
- Author(s)
  H. Sakai
- Journal Title
  
  Archive for Mathematical Logic
  
  Volume: Vol.52, No.1-2 Pages: 29-45
- NAID
  120005367491
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] On proofs of the incompleteness theorems based on Berry's paradox by Vopenka, Chaitin, and Boolos2012
- Author(s)
  Makoto Kikuchi, Taishi Kurahashi, Hiroshi Sakai
- Journal Title
  
  Mathematical Logic Quarterly
  
  Volume: 57 Pages: 307-316
- DOI
  10.1002/malq.201110067
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076, KAKENHI-PROJECT-24540125
[Journal Article] On proofs of the incompleteness theorems based on Berry's paradox by Vopenka, Chaitin, and Boolos2012
- Author(s)
  M. Kikuchi, T. Kurahashi and H. Sakai
- Journal Title
  
  Mathematical Logic Quarterly
  
  Volume: Vol.58 ,No.4-5 Pages: 307-316
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] On proofs of the incompleteness theorem based on Berry's paradox by Vopenka, Boolos and Chaitin2012
- Author(s)
  酒井拓史，倉橋太志，菊池誠
- Journal Title
  
  Mathematical Logic Quarterly
  
  Volume: 58
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] Partial square at \omega_1 is impied by MM but not by PFA2011
- Author(s)
  酒井拓史
- Journal Title
  
  Fundamenta Mathematicae
  
  Volume: 215 Pages: 109-131
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] Partial square at omega_1 is implied by MM but not by PFA2011
- Author(s)
  H. Sakai
- Journal Title
  
  Fundamenta Mathematicae
  
  Volume: Vol.215,No.2 Pages: 109-131
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] On standard model ofMartin's Maximum2011
- Author(s)
  H. Sakai
- Journal Title
  
  京都大学数理解析研究所講究録
  
  Volume: No.1754 Pages: 97-107
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] Reflection and indescribability in the constructible universe
- Author(s)
  J. Bagaria, M. Magidor and H. Sakai
- Journal Title
  
  Israel Journal of Mathematics
  
  Volume: (掲載決定)
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Journal Article] Stationary reflection principles and two cardinal tree properties
- Author(s)
  H. Sakai and B. Velickovic
- Journal Title
  
  Journal of the Institute of Mathematics of Jussieu
  
  Volume: (掲載決定)
- NAID
  120005848133
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] On generalized notion of higher stationarity in P_kappa ( lambda )2018
- Author(s)
  Hiroshi Sakai
- Organizer
  RIMS Workshop "Axiomatic Set Theory and its Applications"
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K03397
[Presentation] On generalized notion of higher stationarity in P_kappa ( lambda )2018
- Author(s)
  Hiroshi Sakai
- Organizer
  Reflections on Set Theoretic Reflection
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K03397
[Presentation] Proof of SCH from reflection principles without using scales2015
- Author(s)
  Hiroshi Sakai
- Organizer
  Sets and Computations
- Place of Presentation
  National University of Singapore
- Year and Date
  2015-04-02
- Invited
- Data Source
  KAKENHI-PROJECT-26610040
[Presentation] Separation of MA^+ (sigma-closed) from reflection principles2013
- Author(s)
  H. Sakai
- Organizer
  ESI Workshop Forcing and Large Cardinals
- Place of Presentation
  Erwin Schrodinger Institute,ウィーン(オーストリア)
- Year and Date
  2013-09-24
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] n-stationary and Pi^1_n-1-indescribable sets2013
- Author(s)
  H. Sakai
- Organizer
  RIMS共同利用研究集会反映原理と巨大基数の集合論
- Place of Presentation
  京都大学数理解析研究所
- Year and Date
  2013-09-11
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] 定常性反映原理と半定常性反映原理(特別講演)2013
- Author(s)
  酒井拓史
- Organizer
  日本数学会年会
- Place of Presentation
  京都大学
- Year and Date
  2013-03-21
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Separation of MA^+ (sigma-closed) from reflection principles2013
- Author(s)
  H. Sakai
- Organizer
  International Conference on Topology and Geometry2013
- Place of Presentation
  島根大学
- Year and Date
  2013-09-05
- Invited
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Consequences of Martin's Maximum and weak square2012
- Author(s)
  H. Sakai
- Organizer
  Workshop of Forcing Axioms and their Applications
- Place of Presentation
  Fields Institute,トロント(カナダ)
- Year and Date
  2012-10-24
- Invited
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Fragments of Martin's Maximum and weak square2012
- Author(s)
  酒井拓史
- Organizer
  ASL 2012 North American Annual Meeting(招待講演)
- Place of Presentation
  University of Wisconsin-Madison (United States of America)
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Fragments of Martin's Maximum and weak square2012
- Author(s)
  H. Sakai
- Organizer
  Association for Symbolic Logic 2012 North American Annual Meeting
- Place of Presentation
  University of Wisconsin-Madison,マディソン(アメリカ)
- Year and Date
  2012-03-31
- Invited
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Chang's Conjecture and weak square2011
- Author(s)
  酒井拓史
- Organizer
  京都大学数理解析研究所共同利用研究集会「記述集合論の展望」
- Place of Presentation
  京都大学数理解析研究所（京都府）
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Chang's conjecture and weak square2011
- Author(s)
  H. Sakai
- Organizer
  RIMS共同利用研究集会記述集合論の展望
- Place of Presentation
  京都大学数理解析研究所
- Year and Date
  2011-10-20
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Chang's conjecture and weak square2011
- Author(s)
  H. Sakai
- Organizer
  the 12th Asian Logic Conference
- Place of Presentation
  Victoria University of Wellington,ウェリントン(ニュージーランド)
- Year and Date
  2011-12-17
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Chang's Conjecture and weak square2011
- Author(s)
  酒井拓史
- Organizer
  12th Asian Logic Conference
- Place of Presentation
  Victoria University of Wellington (New Zealand)
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Fragments of Martin's Maximum and weak square
- Author(s)
  Hiroshi Sakai
- Organizer
  ASL 2012 North American Annual Meeting
- Place of Presentation
  University of Wisconsin-Madison
- Invited
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] 定常性反映原理と半定常性反映原理
- Author(s)
  酒井拓史
- Organizer
  日本数学会年会
- Place of Presentation
  京都大学
- Invited
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Consequences of Martin's Maximum and weak square
- Author(s)
  Hiroshi Sakai
- Organizer
  Workshop on Forcing Axioms and their Applications
- Place of Presentation
  Fields Institute
- Invited
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Separation of MA^+ (sigma-closed) from reflection principles
- Author(s)
  Hiroshi Sakai
- Organizer
  International Conference on Topology and Geometry 2013
- Place of Presentation
  島根大学
- Invited
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] n-stationary and Pi^1_n-1-stationary sets
- Author(s)
  Hiroshi Sakai
- Organizer
  RIMS Workshop "Reflection principles and set theory of large cardinals"
- Place of Presentation
  京都大学数理解析研究所
- Data Source
  KAKENHI-PROJECT-23740076
[Presentation] Separation of MA^+ (sigma-closed) from reflection principles
- Author(s)
  Hiroshi Sakai
- Organizer
  Erwin Schrodinger Institute Workshop "Forcing and Large Cardinals"
- Place of Presentation
  Erwin Schrodinger Institute, ウィーン（オーストリア）
- Invited
- Data Source
  KAKENHI-PROJECT-23740076

1. FUCHINO Sakae (30292098)

# of Collaborated Projects: 5 results

# of Collaborated Products: 0 results
2. USUBA Toshimichi (10513632)

# of Collaborated Projects: 4 results

# of Collaborated Products: 1 results
3. YASUO Yoshinobu (90281063)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
4. MATSUBARA Yo (30242788)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
5. MIYAMOTO Tadatoshi (70229889)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
6. KADA Masaru (00312447)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
7. TOMOYASU Kazuo (10332107)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
8. LAJOS Soukup

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
9. FRIEDMAN Sy-david

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
10. KONIG Bernhard

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
11. B.LARSON Paul

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
12. König Bernhard

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
13. 菊池誠

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Sakai Hiroshi 酒井 拓史

酒井 拓史 サカイ ヒロシ

SAKAI Hiroshi 酒井 拓史

Research Projects

Research Products

Co-Researchers

Toward a solution of the Continuum Problem from the point of view of %% set-theoretic multiverseOngoing

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Higher analogies of reflection principles and cardinal arithmeticPrincipal InvestigatorOngoing

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Research toward a solution of Galvin's conjecture

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Invariant structures on medium-size infinite cardinals

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

On reflection principles at small uncountable cardinalsPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Reflection principles on stationarity and possible extensions of the axiom system of set thoery

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Combinatorics on medium-sized infinite cardinals

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] On the existence of skinny stationary subsets2019

Author(s)

Journal Title

DOI

NAID

Data Source

[Journal Article] Stationary reflection principles and two cardinal tree properties2015

Author(s)

Journal Title

DOI

NAID

Data Source

[Journal Article] Simple proofs of SCH from reflection principles without using better scales2015

Author(s)

Journal Title

DOI

NAID

Data Source

[Journal Article] Reflection and indescribability in the constructible universe2015

Author(s)

Journal Title

Data Source

[Journal Article] Reflection and indescribability in the constructible universe2015

Author(s)

Journal Title

Data Source

[Journal Article] Chang's conjecture and weak square2013

Author(s)

Journal Title

DOI

NAID

Data Source

Sakai Hiroshi 酒井拓史

酒井拓史サカイヒロシ

SAKAI Hiroshi 酒井拓史