Vitae

Personal Data

• Name: KODAMA, Hiroki
• Date of Birth: Dec. 8, 1974
• Place of Birth: Miyazaki, Japan
• Nationality: Japanese

Education

• Tsukubadaigaku-fuzoku Komaba Highschool, graduated in March 1993
• B.S., Mathematics, The University of Tokyo, March 1997
• M.S., Mathematics, The University of Tokyo, March 1999
• Ph.D., Mathematics, The University of Tokyo, March 2002
• research student, April 2002 -- August 2003
  Adviser: Prof. T. Tsuboi

Career

• April 2000 -- March 2002, JSPS Fellow (DC2)
• Sep 2003 -- Sep 2004, COE Fellow, The University of Tokyo
• Oct 2004 -- Sep 2006, JSPS-IHES-EPDI Fellow
  Oct 2004 -- Sep 2005, ESI
  Oct 2005 -- Sep 2006, IHES
• Oct 2006 -- Oct 2007, COE Fellow, The University of Tokyo
• Apr 2007 -- Mar 2008, Part-time lecturer, Meiji University
• Nov 2007 -- Mar 2013, Specially Appointed Assistant Professor, The University of Tokyo
• Apr 2013 -- Mar 2018, Specially Appointed Associate Professor, The University of Tokyo
• Apr 2018 -- Jun 2018, Deputy General Manager, Research and Development Headquarters, Arithmer
• Apr 2018 -- Mar 2019, Collaborative researcher, The University of Tokyo
• Oct 2018 -- Mar 2023, Assistant Professor, Tohoku University
• Oct 2018 -- present, Visiting Scientist, iTHEMS, RIKEN
• Apr 2023 -- present, Research Fellow, MCME, Musashino University

Papers

• A Generalization of Projectively Anosov Flows into High-Dimensional Manifolds and Complex Manifolds, Master thesis, 1998, (JA) [dvi] [ps]
• Hiroki KODAMA, Complex Contact Manifolds with Legendrian Vector Fields, thesis, 2002 [dvi]
• Shigeyuki KAMATANI, Hiroki KODAMA and Takeo NODA, A Birkoff Section for the Bonatti-Langevin Example of Anosov Flows, preprint, 2005 [pdf]
• Hiroki KODAMA and Peter W. MICHOR, The homotopy type of the space of degree 0 immersed plane curves, 2005, to appear in Revista Matematica Complutense [math.DG/0509694] or [ESI-preprint 1703]
• Hiroki KODAMA, Yoshihiko MITSUMATSU, Shigeaki MIYOSHI and Atsuhide MORI, On Thurston's inequality for spinnable foliations, preprint, 2005 [pdf]
• Hiroki KODAMA and Shigenori MATSUMOTO, Minimal C^1 diffeomorphisms of the circle which admit measurable fundamental domains, Proc. Amer. Math. Soc. 141 (2013), 2061-2067 [arXiv:1005.0585v2]
• Hiroki KODAMA, On non-uniformly simple groups, preprint 2011 [arXiv:1107.5125]
• Kentaro Mikami, Hiroki Kodama and Yasuharu Nakae, Higher weight Gel'fand-Kalinin-Fuks classes of formal Hamiltonian vector fields of symplectic R^2, preprint 2012 [arXiv:1210.1662]
• T. Hidaka, A. Shimada, Y. Nakata, H. Kodama, H. Kurihara, T. Tokihiro, and S. Ihara, Simple model of pH-induced protein denaturation, Phys. Rev. E 92, 012709 2015
• Hidoki MORI, Haruki KATAHIRA, Hiroshi GOTO, Hiroki KODAMA, Hideki KENJO, Application of actual shape curve in hard contact lenses, Proceedings of the Joint Meeting of the Japan Eye Infection Society, Japan Eye Inflammation Society, Japan Contact Lens Society, Japan Lacrimal Duct and Tear Society, vol. 52nd-49th-58th-4th pp 118, 2015 (JA)
• Hiroki Kodama, Kentaro Mikami, Tadaysshi Mizutani, First Betti number of weighted homology group of Hamiltonian vector fields on symplectic tori, preprint 2018 [arXiv:1705.10894]
• Hiroki Kodama, Kazuo Masuda, Yoshihiko Mitsumatsu, Derivatives of flat functions, preprint 2018 [arXiv:1805.01879]
• Yukimi GOTO, Tatsuya MIURA, Genki HOSONO, Hiroki KODAMA, Proposal for peripheral curve in hard contact lenses, Mathematical Sciences Practice Research Letter 2018, LMSR 2018-1, [pdf] (JA)
• Yuhiko AOYAMA, Yu TAKAGI, Hiroki KODAMA, Improvement of corneal numerical simulation using finite element method, Mathematical Sciences Practice Research Letter 2018, LMSR 2018-5, [pdf] (JA)
• Hiroki Kodama, Ken'ichi Yoshida, A mathematical model of network elastoplasticity, Proc. of the Royal Society A, vol 478, No. 2260, 20210828 [arXiv:2107.04310]
• Naohiko Kasuya, Hiroki Kodama, Yoshihiko Mitsumatsu, Astuhide Mori, Lefschetz fibrations on the Milnor fibers of cusp and simple elliptic singularities, preprint 2021 [arXiv:2111.00749]
• Hiroki Kodama, Expansion of a digraph with a doubly bidirectionally connected pair is not cactus, preprint 2023 [arXiv:2312.17327]
• Hiroki Kodama, Hiroshi Morita, Motoko Kotani, A mathematical model of thermoplastic elastomers for analysing the topology of microstructures and mechanical properties during elongation, Proc. of the Royal Society A, vol 480, No. 2286, 20230389, Python program code is available at this page.

Book

• Hiroki Kodama, Yoichi Nakata, Protein Structures, Mathematical Modeling for Genes to Collective Cell Dynamics, Section 5, 161-175, Springer, Mar. 2022

Talks

• A Generalization of pA Flows into Higher Dimensions, Miyajima, Japan, Dec. 1998, j/w Takashi TUBOI
• A Generalization of pA Flows, Topology Izu Seminar, Izu, Mar. 1999, (JA)
• Holomorphic contact structures and Legendrian flows, the bi-annual meeting of the Mathematical Society of Japan, Hiroshima Univ., Japan, Sep. 1999, (JA)
• Holomorphic contact structures and Legendrian flows, Complex Dynamics - WEB Geometry - Chaotic Quantum System, Ryukoku Univ., Japan, Oct. 1999,
• Projectively Anosov flows and metrics, Topology Izu Seminar, Izu, Japan, Mar. 2000, (JA)
• Holomorphic contact structures and Legendrian flows, Foliations:~Geometry and Dynamics, Banach Center, Warsaw, Poland, 7 Jun. 2000
• Holomorphic contact structures and Legendrian vector fields, Foliations and Geometry 2001, PUC Rio, Rio de Janeiro, Brazil, Aug. 2001
• Complex 3 dimensional contact manifolds and holomorphic vector fields, Topological researches on foliations, Hakkaisan, Japan, 22 Oct. 2001
• Complex 3 dimensional contact manifolds with Legendrian vector fields, Topology Tuesday seminar, Univ. of Tokyo, Japan, 22 Jan. 2002, (JA)
• Complex 3 dimensional contact manifolds with Legendrian vector fields, The 49th topology symposium, Naha, Japan, 24 Jul. 2002, (JA)
• Complex contact three manifolds with Legendrian vector fields, Geometries of foliations, Ryukoku Univ., Japan, 13 Sep. 2002
• Euler equation and dynamics, the 2nd dynamical system and foliation "nigate" seminar, Tokushima Univ., Feb. 2003, (JA)
• On the complex contact structures, Workshop on Topology, Univ. of Tokyo, Japan, Sep. 2003
• Holomorphic contact forms with Legendrian vector fields on closed complex 3-manifolds, Geometry and Foliations 2003, Ryukoku Univ., Japan, Sep. 2003
• Open-book decompositions of the three dimensional torus that define tight contact structures, Contact structures, Singularities and related subject, Matsumoto, Japan, Jan. 2004, (JA)
• On Thurston's inequality for openbook foliations, Geometry Seminar, Universitaet Wien, Vienna, Austria, 20 Oct. 2004, j/w Yoshihiko MITSUMATSU, Shigeaki MIYOSHI and Atsuhide MORI
• On Thurston's inequality for openbook foliations II, Geometry Seminar, Universitaet Wien, Vienna, Austria, 27 Oct. 2004, j/w Yoshihiko MITSUMATSU, Shigeaki MIYOSHI and Atsuhide MORI
• On commutators of diffeomorphisms, FOLIATIONS 2005, Uniwersytet Lodzki, Lodz, Poland, 20 Jun. 2005, j/w Stefan HALLER and Josef TEICHMANN
• Smooth representations of diffeomorphism groups by commutators, Meeting of diffeomorphisms and the related fields, Matsumoto, Japan, 19 Dec. 2005, j/w Stefan HALLER and Josef TEICHMANN
• The homotopy group of the space of degree 0 immersed plane curves, COE seminar, Univ. of Tokyo, Japan, 27 Dec. 2005, j/w Peter W. MICHOR, (JA)
• The homotopy type of the space of degree 0 immersed plane curves, Le séminaire de mathématiques du LMAM , Université de Bretagne-Sud, Vannes, France, 24 Feb. 2006, j/w Peter W. MICHOR, Invited
• The homotopy group of the space of degree 0 immersed plane curves, Séminaire de Géométrie, Université Bordeaux 1, France, 3 Mar. 2006, j/w Peter W. MICHOR, Invited
• The homotopy group of the space of degree 0 immersed plane curves, Foliation and geometry, Tambara Institute of Mathematical Sciences, Univ. of Tokyo, JAPAN, 27 Oct. 2006, j/w Peter W. MICHOR
• The homotopy group of the space of degree 0 immersed plane curves, Keio topology seminar, Keio Univ., 4 Dec. 2006, j/w Peter W. MICHOR
• Geometric Crash Course Seminar, Fluid Dynamics Young Researchers Summer School 2007, Kyoto Prefectural Youth Marine Center, Miyazu City, Kyoto Prefecture, JAPAN, 18 Jul 2007 (JA)
• The homotopy group of the space of degree 0 immersed plane curves, "Foliations, Topology and Geometry in Rio", PUC Rio, Rio de Janeiro, Brazil, 7 Aug 2007, j/w Peter W. MICHOR
• On Thurston's inequality for foliation 1, Foliation symposium, Tambara Institute of Mathematical Sciences, the University of Tokyo, 30 Oct 2007, j/w Yoshihiko MITSUMATSU, Shigeaki MIYOSHI, Atsuhide MORI (JA)
• Thurston's inequality and open book foliations, Tokyo-Seoul Conference in Mathematics Geometry and Topology, Iniv. of Tokyo, 1 Dec 2007, j/w Yoshihiko MITSUMATSU, Shigeaki MIYOSHI, Atsuhide MORI, Invited
• On infinite alternating groups, Various Aspects of Topology and Representation Theory 2009, Tambara Institute of Mathematical Sciences, the University of Tokyo, 3 Oct 2009 (JA)
• On non-uniformly simple groups, Shinshu topoogy symposium, Shinshu Univ., 18 Dec. 2009, Invited (JA)
• On infinite alternating groups, 33th topology seminar (ex- Izu topology seminar), Minamibousou, Chiba, JAPAN, 16 Mar. 2010 (JA)
• On non-uniformly simple groups, Annual meeting of MSJ, Keio Univ., 24 Mar. 2010 (JA)
• Embedding Theorem, Workshop on Coarse Geometry 2, Univ. of Tokyo, 15 Sep 2010 (JA)
• Minimal C^1 diffeomorphisms of the circle which admit measurable fundamental domains, Foliations and Groups of Diffeomorphisms 2010, Tambara Institute of Mathematical Sciences, the University of Tokyo, 25 Oct 2010, j/w Shigenori MATSUMOTO
• Minimal C^1 diffeomorphisms of the circle which admit measurable fundamental domains, Symplectic Geometry and Its Surroundings, AAkita Univ., 18 Nov 2010, j/w Shigenori MATSUMOTO, Invited (JA)
• In Search of Miracle Drugs for Cancer: Mathematical Scientific Approaches in Drug Discovery, Exploring the Integration of Mathematics with Various Fields: Advancements in Mathematics., Tohoku Univ., 27 Nov 2010, Invited (JA)
• Mathematics of Protein Modeling Using Fatgraph Models, CREST seminar, Tohoku Univ., 13 May 2011, Invited (JA)
• Report from JIR Acceptance Relations Participants 1, Workshop on Journalist-in-Residence Programs in Mathematical Sciences, Tambara Institute of Mathematical Sciences, the University of Tokyo, 27th May 2011, Invited (JA)
• On non-uniformly simple groups, Aspects of Topology 2011, Tambara Institute of Mathematical Sciences, the University of Tokyo, 24 Jul 2011
• On non-uniformly simple groups, TIT Murakami seminar, TIT, 26 Jan 2012, Invited
• Minimal C^1-diffeomorphisms of the circle which admit measurable fundamental domains, Foliations 2012, Uniwersytet Lodzki, Lodz, Poland, 28 Jun 2012
• Minimal C^1-diffeomorphisms of the circle which admit measurable fundamental domains, Special Program on Teichmueller Theory, Erwin Schroedinger Institute Vienna, Austria, 15 Feb 2013
• Molecular Module Structure in Living Organisms, iBMath kick-off meeting, Univ. of Tokyo, 28 May 2013 (JA)
• Geometry of Protein Modeling, Mathematical Sciences Symposium, Univ. of Tokyo, 28 Jun 2013 [hand-out] (JA)
• An explsit constraction of homeomorphism from the symmetric space $F_3(S^1)$ to $S^3$, Waseda Univ. geometrical topology seminar, 8 Jul 2013, Invited (JA)
• Minimal $C^1$-diffeomorphisms of the circle which admit measurable fundamental domains, Geometry and Foliations 2013, poster session, Univ. of Tokyo, 9--14 Sep 2013
• Minimal $C^1$-diffeomorphisms of the circle which admit measurable fundamental domains, Kanto dynamics seminar, Univ. of Tokyo, 4 Oct 2013”N, Invited (JA)
• Minimal $C^1$-diffeomorphisms of the circle which admit measurable fundamental domains, Tuesday Seminar on Topology, Univ. of Tokyo, 19 Nov 2013, Invited (JA)
• Minimal $C^1$-diffeomorphisms of the circle which admit measurable fundamental domains, Geometry and topology of macromolecule folding, CENTRE for QUANTUM GEOMETRY of MODULI SPACES, Aarhus University, Denmark, 6 Dec 2013, Invited
• TBA, Shimane University [Mathematical Biology] - University of Tokyo iBMath Joint Research Meeting: Current Status and Future Challenges in Experimental, Mathematical Modeling, and Simulation of Biological Dynamics, Matsue, Shimane, JAPAN, 26 Dec 2013 (JA)
• Protein Structure Analysis from Fatgraph Representations, "Mathematics of Life Dynamics and Its Applications" - Integration of Mathematical Sciences and Biomedical Science -, Univ. of Tokyo, 22 Jan 2014 (JA)
• Minimal $C^1$-diffeomorphisms of the circle which admit measurable fundamental domains, 2nd iBMath summer school, Tambara Institute of Mathematical Sciences, the University of Tokyo, 24 Jul 2014 (JA)
• Protein Structure and Combinatorics, The 2nd Mathematical Design Dojo, IBM Amagi homestead, 26 Jul 2014 (JA)
• Minimal $C^1$-diffeomorphisms of the circle which admit measurable fundamental domains, ICM, Seoul, Korea, 19 Aug 2014
• Minimal $C^1$-diffeomorphisms of the circle which admit measurable fundamental domains, Mathematical Symposium ENS Lyon-Todai, poster session, ENS-Lyon, France, 24 Jun 2015
• Interpolation of Surfaces via Partition of Unity, 1st Real Shape Lens Innovation Meeting, Tokyo Medical Univ., 18 Dec 2015 (JA)
• "Classification of Tight Contact Structures on Three-Dimensional Manifolds and Connected Components of the Space of Taut Foliations I, "Contact Structures, Singularities, Differential Equations, and Related Topics", Kanazawa, JAPAN, 21 Jan 2016 (JA)
• "Classification of Tight Contact Structures on Three-Dimensional Manifolds and Connected Components of the Space of Taut Foliations II, "Contact Structures, Singularities, Differential Equations, and Related Topics", Kanazawa, JAPAN, 22 Jan 2016 (JA)
• Planar Diagrams (of RNA) and Arc Diagrams, Research Symposium "Life Dynamics and Its Mathematics", Matsue, Shimane, JAPAN, 20 Feb 2017 (JA)
• Consideration of flat functions, Tambara Topology and Geometry Seminar, Tambara Institute of Mathematical Sciences, 1 Aug 2017, j/w Kazuo MASUDA, Yoshihiko MITSUMATSU (JA)
• On the higher-order derivatives of flat functions, Foliations and Diffeomorphism Groups 2017, Tambara Institute of Mathematical Sciences, the University of Tokyo, 23 Oct 2017, j/w Kazuo MASUDA, Yoshihiko MITSUMATSU (JA)
• On the higher-order derivatives of flat functions, Waseda geometrical topology seminar, Waseda Univ., 28 Mar 2018, j/w Kazuo MASUDA, Yoshihiko MITSUMATSU (JA)
• Non-symmetric Distance and Its Surroundings, Tambara Topology and Geometry Seminar 2018, Tambara Institute of Mathematical Sciences, the University of Tokyo, 24 Aug 2018 (JA)
• On the higher-order derivatives of flat functions, The Autumn Division Meeting of MSJ, Okayama Univ., 29 Sep 2018, j/w Kazuo MASUDA, Yoshihiko MITSUMATSU (JA)
• Asymmetric metric and coarse geometry, iTHEMS math seminar, RIKEN, Wako, Saitama, JAPAN, 20 Jun 2019
• Random Walk on Periodic Graphs Embedded in Euclidean Space, Research Symposium "Gokayama topology and geometry seminar", Kanazawa Univ. Gokayama Seminar house, 30 Aug 2019 (JA)
• Tension tensors of harmonic nets, Discrete Geometric Analysis and its Applications, Zoom, 8 Jan 2022, [slides]
• Torus Fibration from $S^5$ to $S^3$ Induced by a Complex Surface Singularity's Milnor Fibres, Autumn Division Meeting of the MSJ, Hokkaido Univ., 6 Sep 2022, j/w Naohiko KASUYA, Yoshihiko MITSUMATSU, and Atsushi MORI, [slides] (JA)
• Approximation of Finite Metric Spaces by Trees, Integration and Deepening of Machine Learning and Mathematical Models, Kyushu Univ (and zoom hybrid), 7 Sep 2023, (JA)
• A harmonic representation of a square lattice split at one point, Hotel Ito garden, Ito, Shizuoka, JAPAN, 11--12 Mar 2024 (JA)
• A harmonic representation of a square lattice split at one point, talk via zoom, Foliated Spaces, Tilings and Group Actions 2024, Universidad Politecnica de Madrid, Spain, and zoom hybrid, 26 Mar 2024