Activities (International only)

2026


Visit to Vincent Pilaud and Arnau Padrol

• 1.12--1.16
  
• University of Barcelona (Barcelona, Spain)


Organizer of Workshop "Recent Developments on Lattice Polytopes in Leipzig" (with Hidefumi Ohsugi and Irem Portakal)
• 1.20--1.23
  
• Max Planck Institute for Mathematics in the Sciences (Leipzig, Germany)


Visit to Fatemeh Mohammadi

• 3.9--3.16
  
• KU Leuven (Leuven, Belgium)

2025


Visit to Nayana Shibu Deepthi

• 2.16--2.24
  
• IISER Mohali (Chandigarh, India)


Invited Speaker at Conference "Arrangements in Osaka 2025"

• 12.15--12.19
  
• Osaka University (Osaka, Japan)

2024


Visit to Mateusz Michalek

• 2.12--2.16
  
• University of Konstantz (Konstantz, Germany)


Visit to Alessio D'Ali

• 2.19--2.23
  
• Politecnico di Milano (Milano, Italy)


Viva voce for Thomas Hall

• 5.26--5.28
  
• The University of Nottingham (Nottingham, England)


Visit to Oliver Clarke

• 5.28--6.1
  
• The University of Edinburgh (Edinbrugh, England)

2023


JSPS Postdoctoral Fellowships for Research in Japan (Summer program)

Kieran BHASKARA (McMaster University)
  2023/6/16--2023/8/25



Invited Speaker at Conference "Combinatorics, geometry and commutative algebra of hyperplane arrangements"

• 1.16--1.20
  
• Kyushu University (Fukuoka, Japan)


Organizer of Workshop "Characteristic Polynomials of Hyperplane Arrangements and Ehrhart Polynomials of Convex Polytopes" (with Norihiro Nakashima) (postponed from June 2020 to March 2021, from March 2021 to March 2022, and from March 2022 to February 2023, due to outbreak of coronavirus)

• 2.14--2.17
  
• RIMS (Kyoto, Japan)


Organizer of Workshop "Combinatorial and Algebraic Aspects of Lattice Polytopes" (with Hidefumi Ohsugi)

• 2.20--2.22
  
• Kwansei Gakuin University (Nishinomiya, Japan)


Visit to Katharina Jochemko, Luis Ferroni and Mariel Supina

• 6.1--6.10
  
• KTH Royal Institute of Technology (Stockholm, Sweden)


Visit to Robert Davis

• 8.7--8.12
  
• Colgate University (Hamilton, USA)


Visit to Laura Escobar

• 8.13--8.19
  
• Washington University in St. Louis (St. Louis, USA)

2022


JSPS Postdoctoral Fellowships for Research in Japan (Short-term)

Oliver CLARKE (University of Bristol)
  2022/5/30--2022/11/29

Thomas HALL (University of Nottingham)
  2022/8/17--2022/12/16



Invited Speaker at Conference "Mini-Symposium on Lattice Polytopes"

• 3.3--3.4
  
• Online, hosted by Johannes Hofscheier and Katharina Jochemko


Invited Participant of AIM Workshop "Ehrhart polynomials: inequalities and extremal constructions" (postponed from September 2020 to May 2022, due to outbreak of coronavirus)

• 5.9--5.13
  
• American Institute of Mathematics (San Jose, USA)

Visit to Martina Juhnke-Kubitzke

• 5.16--5.20
  
• Osnabrück University (Osnabrück, Germany)


Visit to Fatemeh Mohammadi

• 5.23--5.27
  
• Ghent University (Ghent, Belgium)


Organizer of Workshop "Toric Degenerations and Mirror Symmetry in Kumamoto" (with Naoki Fujita)

• 10.13--10.14
  
• Kumamoto City International Center (Kumamoto, Japan)

2021

Invited Speaker at Conference "Combinatorics on Flag Varieties and Related Topics 2021"

• 1.25--1.27
  
• Online, hosted by Ajou University (Suwon, Korea)


Invited Speaker at Conference "Algebraic and Combinatorial Aspects of Polytopes" (AMS Western Sectional Meeting)

• 5.1
  
• Online, hosted by San Francisco State University (San Francisco, USA)


Speaker at KTH Seminar, Combinatorics

• 9.15
  
• KTH (online)

2020

Invited Speaker at 2020 Taipei International Conference on Combinatorics (cancelled due to outbreak of coronavirus)

• 2.6--2.8
  
• Institute of Mathematics, Academia Sinica (Taipei, Taiwan)


Visit to Fatemeh Mohammadi

• 2.17--2.23
  
• University of Bristol (Bristol, England)


Visit to Mateusz Michalek (cancelled due to outbreak of coronavirus)

• 3.22--3.28
  
• Max Planck Institute for Mathematics in the Sciences (Leipzig, Germany)


Visit to Robert Davis (cancelled due to outbreak of coronavirus)

• 4.20--4.24
  
• Colgate University (Hamilton, USA)


Visit to Janet Page (cancelled due to outbreak of coronavirus)

• 4.27--5.1
  
• University of Michigan (Ann Arbor, USA)


Invited Speaker at Conference "The McKay correspondence, mutation and related topics"

• 7.17, 7.24, 7.31, 8.7, 8.14
  
• Online

2019

Visit to Johannes Hofscheier

• 8.7--8.10
  
• McMaster University (Hamilton, Canada)


Organizer of Workshop "Mutations: Mirror Symmetry, Deformations, and Combinatorics" (with Johannes Hofscheier and Alexander Kasprzyk)

• 8.11--8.16
  
• Banff International Research Station (Banff, Canada)


Organizer of Workshop "Commutative Algebra and Lattice Polytopes" (with Hidefumi Ohsugi)

• 10.28--11.1
  
• RIMS (Kyoto, Japan)


Viva voce for Daniel Cavey

• 11.27--12.4
  
• The University of Nottingham (Nottingham, England)


Visit to Fatemeh Mohammadi

• 12.4--12.6
  
• University of Bristol (Bristol, England)

2018

Visit to Katharina Jochemko

• 3.21--3.29
  
• KTH Royal Institute of Technology (Stockholm, Sweden)


Visit to Alexander Kasprzyk

• 3.29--4.6
  
• The University of Nottingham (Nottingham, England)


Visit to FU Berlin, Seminar Talk and PhD Defense of Florian Kohl

• 7.5--7.6
  
• Freie Universität Berlin (Berlin, Germany)


Visit to Alexander Kasprzyk

• 8.27--8.31
  
• The University of Nottingham (Nottingham, England)


Visit to Matthias Beck

• 9.17--9.21
  
• San Francisco State University (San Francisco, USA)

2017

Visit to Alexander Kasprzyk

• 2.13--3.1
  
• The University of Nottingham (Nottingham, England)


Invited Speaker of Conference "Interactions with Lattice Polytopes"

• 9.14--9.16
  
• Otto von Guericke University Magdeburg (Magdeburg, Germany)


Organizer of Mini-Workshop "Lattice Polytopes: Methods, Advances, Applications" (with Takayuki Hibi, Katharina Jochemko, Benjamin Nill)

• 9.18--9.22
  
• Mathematisches Forschungsinstitut Oberwolfach (Oberwolfach, Germany)


Visit to Mateusz Michalek

• 12.11--12.15
  
• Max Planck Institute for Mathematics in the Sciences (Leipzig, Germany)

2016

Speaker at Conference "Workshop on Commutative Algebra -Part II, Local Algebra and Representation theory-"

• 1.3--1.7
  
• VIASM's Villa (Halong bay, Vietnam)


Organizer of Conference "Computational Commutative Algebra and Convex Polytopes"

• 8.1--8.5
  
• RIMS in Kyoto University (Kyoto, Japan)


Invited Speaker at Conference "Einstein Workshop on Lattice Polytopes"

• 12.12--12.15
  
• Freie Universität Berlin (Berlin, Germany)

2015

Visit to Alexander Kasprzyk
• 2.9--2.18
  
• Imperial College (London, England)

Visit to Victor Batyrev
• 2.25--3.6
  
• Universität Tübingen (Tübingen, Germany)


Speaker at Conference "Lefschetz Properties"
• 3.7--3.14
  
• Goerg-August-Universität Göttingen (Göttingen, Germany)


Speaker (contributed talk) at Conference "Current Trends on Gröbner Bases"
• 7.1--7.10
  
• Hotel Nikko Osaka (Osaka, Japan)

2014

Visit to Benjamin Nill
• 8.25--9.11
  
• Stockholm University (Stockholm, Sweden)

2013

Speaker at Conference "AMS sectional meeting (Special session on combinatorial commutative algebra)"

• 10. 5--10. 6
  
• University of Louisville (Louisville, USA)


Visit to Augstine O'Keefe

• 10. 7--10. 11
  
• University of Kentucky (Lexington, USA)


Speaker at Conference "AMS sectional meeting (Special session on combinatorial commutative algebra)"

• 10. 12--10. 13
  
• Temple University (Philadelphia, USA)


Speaker at Conference "International conference on Commutative algebra and its interaction to algebraic geometry and combinatorics"

• 12. 16--12. 20
  
• Institute of Mathematics Hanoi (Hanoi, Vietnam)

2012

Speaker at Conference "Shanghai Conference on Algebraic Combinatorics"

• 8.17-- 8.22
  
• Shanghai Jiao Tong University (Shanghai, China)


Visit to Moscow State University

• 9.24--10.5
  
• Moscow State University (Moscow, Russia)

2011

Speaker at Conference "Toric Topology and Automorphic functions"
• 9. 5-- 9. 9
  
• Pacific National University (Khabarovsk, Russia)


Speaker at Conference "Workshop on Algebraic Combinatorics"
• 9.15-- 9.19
  
• Shanghai Jiao Tong University (Shanghai, China)