Personal Information
Name: Hisanori OHASHI
Birth: February 3rd, 1981. Chita, Aichi-prefecture, JAPAN Nationality: Japan
Language Skill: Japanese (mother tongue), English (TOEIC: 875)
Contact Information
Address: Department of Mathematics, Faculty of Science and Technology, Tokyo University of Science,
2641 Yamazaki, Noda, Chiba 278-8510, JAPAN Phone: +81-4-7122-1782 (Ext. 3124)
E-mail: ohashi hisanori (atmark) ma.noda.tus.ac.jp URL: http://www.ma.noda.tus.ac.jp/u/oh/index.html
Education
March 2009 Ph. D. in Science (mathematics), RIMS Kyoto University Advisor: Prof. Shigeru Mukai
Thesis: ”Enriques surfaces covered by Jacobian Kummer surfaces”
March 2005 Master’s degree in Science, RIMS Kyoto University March 2003 Bachelor’s degree in Science, Kyoto University
Career History
Apr. 2014 - Junior associate professor, Tokyo University of Science Apr. 2012 - Mar. 2014 Assistant Professor, Tokyo University of Science Nov. 2010 - Mar. 2012 Designated Assistant Professor, Nagoya University Apr. 2009 - Oct. 2010 GCOE Research Fellow, RIMS Kyoto University Apr. 2007 - Mar. 2009 Research Fellow (DC2), JSPS
Scholarships and Grants
Jul. 2015 - Mar. 2016 Start-up Support (Tokyo university of Science) Apr. 2015 - Mar. 2019 Grant-in-Aid for Young Scientists (B)
May 2011 - Mar. 2015 Grant-in-Aid for Young Scientists (B)
Oct. 2009 - Mar. 2011 Grant-in-Aid for Young Scientists (Start-up) Jul. 2007 - Mar. 2009 Grant-in-Aid for JSPS Fellows
Apr. 2005 - Mar. 2007 Graduate Scholarship, Japan Student Services Organization Apr. 2003 - Mar. 2005 Graduate Scholarship, Japan Scholarship Foundation
1
Teaching
2015/2H seminars (4th), Galois theory (3rd), seminars (3rd), linear algebra (2nd), set theory exercise (1st)
2015/1H seminars (4th), manifolds and de Rham cohomology (4th), group theory seminars (3rd), linear algebra (2nd)
2014/2H cohomology (4th-M1), commutative rings (3rd), seminars (3rd), linear algebra (2nd)
2014/1H complex geometry (4th-M1), geometry seminars (3rd), linear algebra (2nd) 2013/2H Practice on Computers (2nd), linear algebra ex. (1st), calculus ex. (1st) 2013/1H group theory seminar (3rd), calculus ex. (1st), set theory ex. (1st)
2012/2H advanced exercise class (2nd), linear algebra ex. (1st), set theory ex. (1st) 2012/1H linear algebra ex. (1st), calculus ex. (1st), set theory ex. (1st)
Sep. 2009 - Mar. 2010 Part-time Lecturer, ”Numerical Computations”
at Osaka Electro-Communication University Jul. 2008 - Feb. 2009 Teaching Assistant, Kyoto University
Research interests
Area: Algebraic Geometry
Keywords: K3 surfaces, Enriques surfaces, Automorphisms, Projective geometry,
Elliptic surfaces, Lattices, Mathieu groups, Log del Pezzo surfaces, Singularities, Irreducible symplectic manifolds, Deformations
Finite groups, Moonshine phenomena
Papers
(1) H. Ohashi, Bi-canonical representations of finite automorphisms acting on Enriques sur- faces, preprint.
(2) S. Mukai and H. Ohashi, Finite groups of automorphisms of Enriques surfaces and the Mathieu group M12, preprint.
(3) D. Hwang, J. Keum and H. Ohashi, Gorenstein Q-homology projective planes, Sci. China Math., 58 (2015), 501-512.
(4) S. Mukai and H. Ohashi, The automorphism groups of Enriques surfaces covered by sym- metric quartic surfaces, to appear in ‘Recent advances in Algebraic geometry’, London Math. Soc. Lecture Note Ser. 417.
(5) H. Ohashi and M. Wandel, Non-natural non-symplectic involutions on symplectic manifolds of K3[2]-type, submitted.
(6) H. Ito and H. Ohashi, Classification of involutions on Enriques surfaces, Michigan Math.
J., 63 (2014), 159-188.
(7) S. Mukai and H. Ohashi, Enriques surfaces of Hutchinson-G¨opel type and Mathieu auto- morphisms, in ‘Arithmetic and Geometry ofK3 surfaces and Calabi-Yau threefolds’, Fields Institute Communications 67 (2013), 429-454.
(8) S. Ma, H. Ohashi and S. Taki, Rationality of the moduli spaces of Eisenstein K3 surfaces, to appear in Trans. Amer. Math. Soc.,
(9) H. Ohashi and S. Taki, K3 surfaces and log del Pezzo surfaces of index three, Manuscripta Math., 139 (2012), 443-471.
(10) H. Ohashi, Hutchinson-Weber involutions degenerate exactly when the Jacobian is Comes- satti, Publ. Res. Inst. Math. Sci., 48 (2012), 107-127.
(11) H. Ohashi, Integral sections of some elliptic K3 surface via the binary Golay code, RIMS- preprint 1696 (May 2010), submitted.
(12) H. Ohashi, Enriques surfaces covered by Jacobian Kummer surfaces, Nagoya Math. J.,195 (2009), 165-186.
(13) H. Ohashi, Counting Enriques quotients of a K3 surface, RIMS-preprint 1609 (Oct. 2007).
(14) H. Ohashi, On the number of Enriques quotients of a K3 surface, Publ. Res. Inst. Math.
Sci., 43 (2007), 181-200.
Lectures
(1) Mini lectures, Hokkaido University of Education (Sapporo), Japan, August 2015.
(2) One-week Lecture, Kyoto University (Kyoto), Japan, June 2015.
(3) One-week Lecture, Nagoya University, September 2008.
Talks
(Proceedings are suggested by ∗.)(1) (scheduled) Arithmetic and Algebraic Geometry 2016, University of Tokyo (Meguro), Japan, January 2016.
(2) Oberwolfach?
(3) (Scheduled) Joint seminar, Tokyo university of Science (Shinjuku), Japan, September 2015.
(4) (Scheduled) Research seminar on algebraic and arithmetic geometry, Leibniz universit¨at Hannover, Germany, September 2015.
(5) (∗) Algebra symposium, Shizuoka university (Shizuoka), Japan, September 2015.
(6) Joint workshop : Geometry and Analysis, Tokyo university of Science (Noda), Japan, May 2015.
(7) String, Lattice and Moonshine, Rikkyo university, Japan, December 2014.
(8) K3, Enriques surfaces and related topics, Nagoya university, Japan, November 2014.
(9) (∗) Workshop “Geometry of Projective varieties and around”, Kochi University, November 2014.
(10) Conference of special varieties in Tambara, Tambara international seminar house, Gunma , Japan, September 2014.
(11) The 2nd workshop on K3 and Enriques surfaces, Asahikawa international hall, Hokkaido, Japan, August 2014.
(12) Workshop on Mathieu moonshine, Tambara international seminar house, Gunma, Japan, August 2014.
(13) Mini-workshop on Calabi-Yau varieties: arithmetic, geometry and physics, Tsuda college, Japan, August 2014.
(14) The 7th Akihabara workshop on algebraic surfaces, Tokyo metropolitan university Aki- habara campus, Japan, July 2014.
(15) Mathematical Society of Japan Spring meeting, Gakushuin University, Japan, March 2014.
(16) Moduli and self-maps, Kyoto university, Japan, March 2014.
(17) Conference of special varieties in Tambara, Tambara international seminar house, Gunma , Japan, September 2013.
(18) Workshop of K3 and Enriques surfaces, Hokkaido University, Japan, August 2013.
(19) Beyond the moonshine, Hotel Hananoyu, Sendai, Japan, July 2013.
(20) New Trends in Arithmetic and Geometry of Algebraic Surfaces, Centre International de Rencontres Math´ematiques, Luminy in France, March 2013.
(21) Arithmetic and Algebraic Geometry 2013, University of Tokyo, Japan, January 2013.
(22) Research seminar Algebraic and Arithmetic Geometry, Leibniz Universit¨at Hannover, Ger- many, August 2012.
(23) Mathematics seminar, Ehime University, Japan, July 2012.
(24) Algebra seminar, Tokyo University of Science, Japan, July 2012.
(25) Algebraic geometry meeting, Saitama University, Japan, July 2012.
(26) Higher dimensional algebraic geometry and around, Kyoto University, Japan, June 2012.
(27) The 9th affine algebraic geometry meeting, Kwansei Gakuin University, Japan, March 2012.
(28) Complex geometry seminar (twice!), Tokyo metropolitan university, Japan, December 2011.
(29) (∗) Kinosaki symposium on Algebraic Geometry, Kinosaki, Japan, October 2011.
(30) Workshop on Algebraic Geometry 2011, Hosei University, September 2011.
(31) (∗) Workshop on the Arithmetic and Geometry of K3 surfaces and Calabi-Yau threefolds, Fields Institute in University of Toronto, August 2011.
(32) GCOE tea time seminar, Kyoto University, December 2010.
(33) V Iberoamerican Congress on Geometry, Universidad de la frontera sede Puc´on (Chile), December 2010.
(34) Algebraic geometry seminar, University of Tokyo, November 2010.
(35) Workshop “Lattices Reflection groups and Algebraic Geometry”, Nagoya University, No- vember 2010.
(36) Seminar, Korea Institute for Advanced Study, November, 2010.
(37) Algebraic geometry seminar, Nagoya University, November, 2010.
(38) (∗) Workshop “Geometry of Projective varieties and around”, Kochi University, November 2010.
(39) Mathematical Society of Japan Autumn meeting, Nagoya University, September 2010.
(40) Research seminar Algebraic and Arithmetic Geometry, Leibniz Universit¨at Hannover, July 2010.
(41) Algebraic geometry seminar, Kyoto University, July 2010.
(42) Algebraic geometry seminar, Waseda University, May 2010.
(43) Complex geometry seminar, Tokyo Metropolitan University, April 2010.
(44) Mathematical Society of Japan Spring meeting, Keio University, March 2010.
(45) Workshop ”Geometry of lattices and infinite dimensional Lie algebras”, IPMU, March 2010.
(46) Workshop for Young Mathematicians, Kyoto University, February 2010 (Poster).
(47) Conference ”Algebraic Geometry in Characteristic p and Related Topics”, University of Tokyo, February 2010.
(48) Kansai Algebraic Geometry seminar, Nara Women’s University, January 2010.
(49) Conference ”Higher dimensional algebraic geometry”, Kyoto University, December 2009.
(50) (∗) Symposium on Algebraic Curves, Yokohama National University, December 2009.
(51) Algebraic geometry seminar, Nagoya University, November 2009.
(52) Kinosaki Symposium on Algebraic Geometry, Kinosaki, Japan, October 2009 (Poster).
(53) Workshop ”Category Theory, Computer Science, and Topology”, Shinshu University, Oc- tober 2009.
(54) Workshop ”K3, Enriques and Special Surfaces”, Rikkyo University, September 2009.
(55) BMS Summer School and Conference ”Moduli 2009”, Humboldt-Universit¨at zu Berlin, August 2009.
(56) Workshop for Young Mathematicians, Seoul National University, February 2009 (Poster).
(57) Algebraic geometry seminar, Osaka University, November 2008.
(58) Kinosaki Symposium on Algebraic Geometry, Kinosaki, Japan, October 2008 (Poster).
(59) Algebraic geometry seminar, Kyoto University, October 2008.
(60) Mathematical Society of Japan Autumn meeting, Tokyo Institute of Technology, September 2008.
(61) Workshop ”Algebraic geometry and Related fields”, Hokkaido University, July 2008.
(62) Conference ”Moduli spaces and birational geometry”, Kyoto University, June 2008.
(63) Workshop for Young Mathematicians, Kyoto University, February 2008 (Poster).
(64) Algebraic geometry seminar, Hokkaido University, January 2008.
(65) Kinosaki Symposium on Algebraic Geometry, Kinosaki, Japan, October 2007 (Poster).
(66) (∗) Kinosaki Symposium on Algebraic Geometry, Kinosaki, Japan, October 2005.
(67) Algebraic geometry seminar, Nagoya University, May 2005.
(68) Algebraic geometry seminar, Kyoto Universit, April 2005.
(69) (∗) Kinosaki seminar for Young Mathematicians, Kinosaki, Japan, February 2005.
Activities Organized
Aug. 2016 (plan) camp-style seminar...
(with D. Matsushita) Mar. 2016 (plan) Noda ...
(with H. Ito)
Jan. 2016 (plan) Younger generation...
(with T. Okada, Y. Gongyo and K. Watanabe)
Oct. 2015 (scheduled) Japanese-European Symposium on Symplectic Varieties and Moduli Spaces at Kyoto (with G. Mongardi and M. Wandel)
Mar. 2015 Noda symposium on algebraic geometry at Noda (with H. Ito)
Oct. 2014 Kinosaki symposium on algebraic geometry at Kinosaki (with K. Oguiso and K. Mitsui)
Jan. 2014 Workshop ”Younger generations in Algebraic and Complex geometry III” at Nagasaki (with T. Okada, Y. Gongyo and K. Watanabe)
Aug. 2013 Workshop on K3 and Enriques surfaces at Sapporo (with S. Saito and S. Taki)
Dec. 2012 Workshop ”Younger generations in Algebraic and Complex geometry II” at Saga (with T. Okada, Y. Gongyo and K. Watanabe)
Aug. 2010 Workshop ”Algebraic geometry and related fields” at Hokkaido University (with Masa-Hiko Saito and Daisuke Matsushita)
Feb. 2010 Workshop ”Younger generations in Complex and Algebraic geometry”
at Kumamoto University (with Takuzo Okada and Takayuki Moriyama)
Survey Articles
(1) H. Ohashi, T. Okada, T. Hayama, H. Fukuyama, Y. Hoshi, D. Yamakawa, Algebraic D- modules and Riemann-Hilbert correspondence (in Japanese), Proceedings of Study Session for Young Mathematicians at Biwako, 323-422, Nov. 2008.
(2) H. Ohashi, T. Okada, S. Taki, H. Fukuyama, Y. Hoshi, Algebraic varieties from the view- point of derived categories (in Japanese), Proceedings of Study Session for Young Mathe- maticians at Biwako, 391-462, Nov. 2007.
Seminar organization
Apr. 2014 - Colloquium at Tokyo university of Science, Noda campus Apr. 2009 - Mar. 2010 Seminar ”GCOE tea time” at Kyoto University
(with Takayuki Moriyama)
Refereeing
JDG?
Math. Nachr.
Publ. RIMS J. MSJ
(a conference)
Journal of algebraic geometry
Commentarii Mathematici Universitatis Sancti Pauli Nagoya Mathematical Journal
Geometria Dedicata
Memberships
Mathematical Society of Japan
Reviewing
• American Mathematical Society
• Zentralblatt
