So Okada

• Email: so.okada at gmail.com.
• Languages: Japanese, English, and Portuguese.

• Mathematics Division Head, Apr 2016 - Mar 2018, Apr 2019 - current,
  Director of Library and Information Network Center, Apr 2022- Mar 2025,
  Associate Professor, Apr 2015 - current,
  Assistant Professor, Oct 2012 - Mar 2015,
  National Instiute of Technology, Oyama College, Oyama Japan.


• Faculty-level Academic Visitor, Apr 2018 - Mar 2019,
  Departamento de Matemática, Universidade Federal de Pernambuco, Recife Brazil.


• Researcher (Global Center of Excellence), Apr 2011 - Sep 2012,
  Program-specific Researcher (Global Center of Excellence), May 2009 - Mar 2011,
  Research Institute for Mathematical Sciences, Kyoto University, Kyoto Japan.


• Full-time Visiting Research Fellow, Nov - Dec 2010, Nov - Dec 2009, Nov 2008, Dec 2007 - Feb 2008,
  Institut des Hautes Études Scientifiques, Bures-sur-Yvette France.


• Full-time Research Associate, May 2008 - Apr 2009,
  Mathematical Sciences Institute, Australian National University, Canberra Australia.


• Full-time Research Fellow (postdoc visiting researcher), Sep 2006 - Oct 2007,
  Max Planck Institute for Mathematics, Bonn Germany.


• PhD, Sep 2006,
  University of Massachusetts Amherst, Amherst United States, Advisor: Professor Ivan Mirković.


• MA, Mar 2000, BA, Mar 1998,
  International Christian University, Tokyo Japan, Advisor: Professor Hiroshi Suzuki.


• Short visits:
  • Nov 29 - Dec 1 2017, Mar 22-26 2018, Research Institute of Mathemaical Sciences visiting Prof. A. N. Kirillov, Kyoto.
  • Mar 23 2016, Departamento de Matemática, Universidade Federal de Pernambuco, Recife.
  • Nov 24 - Nov 28 2008, College de France visiting Prof. Don Zagier, Paris.
  • Aug 11 - Aug 15 2008, Max Planck Institute for Mathematics, Bonn.
  • Nov 1 - Nov 17 2007, University of Texas Austin, Austin.
  • Mar 11 - Mar 31 2008, Institute of Advanced Study, Princeton.
  • Jun 29 - Jul 6 2008, Feb 24 - Feb 29 2008, Centre de Recerca Mathematica, Barcelona.

• Merged-log-concavity of rational functions, almost strictly unimodal sequences, and phase transitions of ideal boson-fermion gases, arXiv:2003.02112 .
  • an updated version
• BCOV rings on elliptic curves and eta function, arXiv:1601.08029 .
• On Euler characteristics for large Kronecker quivers, C. R. Acad. Sci. Paris, Ser. I (2012), Vol. 350, Issues 5, March 2012, Pages 273-276.
• A pari/gp program for Poincare polynomials of m-Kronecker quiver modulus by Reineke's formula. Command: poincare_reineke(m,a,b,t).
• A pari/gp program for the above by Manschot-Pioline-Sen formula. Command: poincare_mps(m,a,b,t).
• Homological mirror symmetry for Fermat polynomials, arXiv:0910.2014v3 .
• Joyce invariants for K3 surfaces and mock theta functions, with Anton Mellit, Commun. Number Theory Phys. (2009) Vol 3 Num 4 p.655-676.
• On stability manifolds of Calabi-Yau surfaces, International Mathematics Research Notices (2006) Vol. 2006 : article 58743, 16 pages, 2006.
• Stability manifold of $\mathbb{P}^1$, J. Algebraic Geom. 15 (2006), 487-505.

• Award in Education, National Instiute of Technology, Oyama College, 2016.
• Mathematical Sciences Sponsorship Fund, Elsevier, 2015.
• Grant for Fundamental Education and Research, National Instiute of Technology, Oyama College, Aug 2013 - Apr 2014.
• JSPS Grant-in-Aid for Young Scientists (B) (23740012), Apr 2011 - Mar 2013.
• JSPS Grant-in-Aid for Young Scientists (Start-up) (21840030), Oct 2009 - Mar 2011.

• AdS Seminar, Oct 28 2021, Yau Mathematical Science Center, Tsinghua University.
• International Workshop P-positivity in Matroid Theory and Related Topics, October 5 2021, Research Institute of Mathemaical Sciences, Kyoto University.
• Colloquium, Jun 7 2018, Departamento de Matemática, Universidade Federal de Pernambuco, Recife.
• Number Theory Workshop at Waseda University, Mar 15 2018, Waseda University, Tokyo.
• Conference: Mirror symmetry and applications, Dec 15 2017, Steklov Mathematical Institute, Moscow.
• 2017 MSJ Spring Meeting, Mar 26 2017, Tokyo Metropolitan University.
• Noda Algebraic Geometry Symposium 2016, Mar 14 2016, Tokyo Science University.
• 3rd Yokohama Workshop, Nov 19 2014, Yokohama National University.
• 2014 MSJ Spring Meeting, Mar 15 2014, Gakushuin University.
• Colloquium, Mar 27 2013, Utsunomiya University.
• RIMS Kyoto Representation Theory Seminar, Apr 26 2013, Research Institute of Mathemaical Sciences, Kyoto University.
• The 3rd GCOE Workshop for Young Mathematicians, Feb 20 2012, Kyoto University.
• Differential Topology Seminar, Jan 26 2010, Kyoto University.
• Algebraic Geometry Seminar, Jan 15 2010, Kyoto University.
• Mathematical Field Theory and Topology, Feb 8 2013, Shinshu University.
• 2012 MSJ Autumn Meeting, Sep 20 2012, Kyushu University.
• School and Conference on Modular Forms and Mock Modular Forms and their Applications in Arithmetic, Geometry and Physics, Mar 15 2011, the Abdus Salam International Centre for Theoretical Physics, Trieste.
• XIV International Conference on Representations of Algebras, Aug 15 2010, National Olympics Memorial Youth Center, Tokyo.
• Workshop on Period Integrals and Motives, Feb 17 2010, University of Tokyo.
• Departmental Lecture, Oct 22 2009, Kinki University.
• Summer Seminar, Aug 20-21 2009, Tokyo Metropolitan University, organized by Uehara.
• Algebra and Topology Seminar, Apr 7 May 20 Jun 2009 Sep 9 Sep 23 2008, Australian National University.
• Homotopy Structures in Geometry and Algebra; Derived Categories, Higher Categories, Jul 1 2008, Centre de Recerca Mathematica.
• Special Lecture, Mar 28 2008, Institute of Advanced Study.
• Geometry Seminar, Nov 1 2007, University of Texas Austin.
• AMS Summer Research Conference, Derived Categories in Mathematics and Physics, Jun 18 2007, Snowbird, Utah.
• Mini-workshop on Stability Conditions, Derived Categories, etc., Apr 28 2007, Max Planck Institute for Mathematics.
• Seminar Algebraische Geometrie, Nov 9 2006, Max Planck Institute for Mathematics.
• Geometric Representation Theory Conference, Mar 26 2005, University of Arizona.
• Representation Theory Seminar, Nov 15 and 22 2004, University of Massachusetts Amherst.

• My comment in Community School Newsletter, 2025 Jan, (小山城東小学校学校運営協議会発行 コミュニティ・スクールだより第57号 令和6年度第5号).
• Here to here, a career talk, The 3rd Brazil-Japan Symposium, Japanese Immigration 110 Years, Sep 17 2018, University Main Library, Universidade Federal de Pernambuco, Recife Brazil.
• Three-manifolds according to G. Perelman, an expository article, with Rob Kusner and Eli BeechHaven, Sugaku Seminar 42/10 (2003) 4-6 (in Japanese); also UMass Amherst Department of Math&Stat Newsletter 18 (2003) 1-3.

• Math Colloquium, Oct 2013 - Mar 2021, National Instiute of Technology, Oyama College.
• Math Competion, Jan 2013 - Jan 2018, National Instiute of Technology, Oyama College.
• Stability Conditions and Related Topics in Kyoto, Dec 17 - 19 2012, Kyoto University.
• RIMS Nakajima Seminar, Jan 18-Feb 8 2011, Research Institute of Mathemaical Sciences.
• Working Seminar for Stability Conditions and Related Topics at MPIM, May 1-Jun 15 2007, Max Planck Institute for Mathematics.

• Japan Mathematical Society, Oct 2012 - current.
• American Mathematical Society, Dec 2006 - current.

• National Institute of Technology, Oyama College
  • Fundamental Mathematics Ia, 1MC Spring 2022, 1LRA Spring 2023, 1LRA Spring 2024, 1MC Spring 2025.
  • Fundamental Mathematics Ib, 1MC Fall 2022, 1LRA Fall 2023, 1LRA Fall 2024, 1MC Fall 2025.
  • Fundamental Mathematics II, 1-12345 2019.
  • Fundamental Mathematics A, 1-1235 2016 Fall 1-123 2016 Spring 1LR 2015.
  • Fundamental Mathematics B, 1LR 2013 1A Fall 2012.
  • Linear Algebra I, 2C 2020, 2A 2024.
  • Algebra and Geometry, 2M 2017 2A 2016 Spring 2DM Fall 2012.
  • Calculus Ia, 2LRA Spring 2020, 2LRA Spring 2021.
  • Calculus Ib, 2LRA Fall 2020.
  • Calculus, 2M 2019 2ALR 2017 2LR 2014 2D 2013.
  • Linear Algebra II, 3C 2021.
  • Linear Algebra, 3CDE 2014.
  • Calculus II, 3LRC 2022, 3LRC 2025.
  • Analysis, 3CLR 2015 3CDE 2013 3E Fall 2012.
  • Applied Mathematics, 4A Fall 2012, 4A Spring 2023, 4M Fall 2024, 4A Spring 2025.
  • Probability and Statistics, 4DM Fall 2012.
  • Complex Analysis, S1 Spring 2019 2017 2016 2015 2014 2013.
  • Applied Analysis, S1 Fall 2020, Fall 2021, Fall 2022.
  • Graduation Research, 2015.
• Universidade Federal de Pernambuco
  • Geometria Algébrica (lecturing in Portuguese), Nov 26th 2018.
• University of Massachusetts Amherst
  • Linear Algebra 235.04 Spring 2006.
  • Calculus I, 131.16 Fall 2005.
  • Calculus III, 233.03 Fall 2004.
  • Calculus II, 132.06 Spring 2004.
  • Recitation for Calculus II, Spring 2004.
  • Recitation for Calculus I, Fall 2003.
  • Recitation for Honors Calculus I, Fall 2003.

• Oyama Municipal Library Council, Apr 2022- Mar 2025.
• Oyama Municipal Library Volunteer, Apr 2014 - current.
• Executive Committee Member, Oyama International Festival 2016, Oct 2015 - Feb 2016.
• Community Volunteer, Kyoto Oct 2012, Yuuki Oct 2014 Mar 2015 Oct 2015.
• Disaster Relief Volunteer, Oyama Sep 2015 (Kanto Tohoku Heavy Rain).

• open-science practices
  • python apps for arXiv daily new submissions
    • bXiv for bluesky, Jan 2025 - current.
    • toXiv for mastodon, Mar 2022 - current.
    • twXiv for twitter, Aug 2020 - current.
  • arXiv bots
    • bluesky arXiv bots for all arXiv categories, Feb 2025 - current.
    • mastodon arXiv bots for all arXiv categories, Jan 2023 - current.
    • twitter arXiv bots for all math arXiv categories, (study on these bots, my comment), Mar 2013 - current.
• Feeds for Upcoming conferences in algebraic geometry and RIMS Workshops, 2010 - 2022 (feed43.com is dead in 2023).
• noshow, a simple attendence analyzer for Microsoft 365 teams meetings, Apr 2020 - archived.
• Mimikakiedit BibTeX Mode, Mar 2000.
• Mimikakiedit Tex Math Macros, Feb 2000.