So Okada
 Birth: Recife Brazil.
 Email: so.okada at gmail.com.
 Languages: Japanese, English, and Portuguese.
Academic Track:

Chair of Mathematics,
Apr 2016  Mar 2018, Apr 2019  current,
Associate Professor,
Apr 2015  current,
Assistant Professor,
Oct 2012  Mar 2015,
National Instiute of Technology, Oyama College,
Oyama Japan.

Facultylevel Academic Visitor
, Apr 2018  Mar 2019,
Departamento de Matemática,
Universidade Federal de Pernambuco
, Recife Brazil.

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

Fulltime Visiting Research Fellow,
Nov  Dec 2010,
Nov  Dec 2009,
Nov 2008,
Dec 2007  Feb 2008,
Institut des Hautes Études
Scientifiques,
BuressurYvette France.

Fulltime Research Associate,
May 2008  Apr 2009,
Mathematical
Sciences Institute,
Australian National University,
Canberra Australia.

Fulltime 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.
 Short visits:
 Nov 29  Dec 1 2017, Mar 2226 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.
Research Interests:
logconcavity; stability conditions.
Selected Research Articles (Google Scholar):

Mergedlogconcavity of rational functions, semistrongly
unimodal sequences, and phase transitions of ideal bosonfermion
gases,
arXiv:2003.02112
.

an updated version
with more introduction, metallic ratios,
Corollary 13.16, and some minor corrections (Dec 2020).

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 273276.

A pari/gp program
for
Poincare polynomials of mKronecker quiver modulus by Reineke's formula. Command: poincare_reineke(m,a,b,t).

A pari/gp program
for the above
by ManschotPiolineSen 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.655676.

On stability manifolds of CalabiYau surfaces,
International Mathematics Research Notices (2006) Vol. 2006 : article 58743, 16 pages, 2006.

Stability manifold of $\mathbb{P}^1$,
J. Algebraic Geom. 15 (2006), 487505.
Awards/Grants:

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 GrantinAid for Young Scientists (B) (23740012),
Apr 2011  Mar 2013.

JSPS GrantinAid for Young Scientists (Startup) (21840030),
Oct 2009  Mar 2011.
Presentations:

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, 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 2021 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.
 Miniworkshop 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.
Outreach:

Here to here, a career talk,
The 3rd BrazilJapan Symposium,
Japanese Immigration 110
Years, Sep 17 2018, University Main Library,
Universidade Federal de Pernambuco, Recife Brazil.

Threemanifolds according to G. Perelman, an expository article,
with Rob
Kusner and Eli BeechHaven,
Sugaku
Seminar 42/10 (2003) 46 (in Japanese); also
UMass Amherst Department of Math&Stat Newsletter 18 (2003) 13.
Organizer Experiences:

Math Colloquium,
Oct 2013  current, National
Instiute of Technology, Oyama College.

Math Competion,
Jan 2013  Jan 2018 (paused),
National Instiute of Technology, Oyama College.

Stability Conditions and Related Topics in Kyoto, Dec 17  19 2012, Kyoto University.
 RIMS Nakajima Seminar, Jan 18Feb 8 2011,
Research Institute of
Mathemaical Sciences.

Working Seminar for Stability Conditions and Related Topics at MPIM, May 1Jun 15 2007, Max Planck Institute
for Mathematics.
Professional Memberships:

Japan Mathematical Society,
Oct 2012  current.

American Mathematical Society,
Dec 2006  current.
Lecturing Experiences:

National Institute of Technology, Oyama College
 Linear Algebra II, 3C 2021
 Applied Analysis, S1 Fall 2020
 Calculus Ib, 2LRA Fall 2020
 Calculus Ia, 2LRA Spring 2020,
2LRA Spring 2021
 Linear Algebra I, 2C 2020
 Basic Mathematics II,
112345 2019
 Calculus, 2M 2019
2ALR 2017 2LR 2014 2D 2013
 Algebra and Geometry, 2M 2017 2A 2016 Spring 2DM Fall 2012
 Analysis, 3CLR 2015 3CDE 2013 3E Fall 2012
 Applied Mathematics, 4A Fall 2012
 Basic Mathematics A, 11235 2016 Fall 1123 2016 Spring 1LR 2015
 Basic Mathematics B, 1LR 2013 1A Fall 2012
 Complex Analysis, S1 Spring 2019 2017 2016 2015 2014 2013
 Graduation Research, 2015
 Linear Algebra, 3CDE 2014
 Probability and Statistics, 4DM Fall 2012

Universidade Federal de Pernambuco

Geometria Algébrica (lecturing in Portuguese), Nov 26th 2018

University of Massachusetts Amherst
Community Activities:
 Oyama Library Volunteer, Apr 2014  current
 Exective 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)
Tools:

twXiv,
a python app for arXiv daily new submissions,
abstracts, crosslists, and replacements by tweets,
replies, retweets, and quotes,
Aug 2020  current.

noshow,
a simple analyzer for attendance reports of Microsoft 365 teams meetings, Apr 2020  archived.
 twitter arXiv bots
for Math.AC,
Math.AG, ...,
(study on these bots,
my comment), Mar 2013  current.
 Feeds for
Upcoming conferences in algebraic geometry and
RIMS Workshops.
 Mimikakiedit BibTeX Mode.
 Mimikakiedit Tex Math Macros.
Short Bio: I was born in Recife Brazil to
Japanese parents. My father
wrote papers on fish biology (piscicultura) at the
Universidade Federal de
Pernambuco. He was dispatched to Brazil by
Japan International Cooperation
Agency. We left Recife for Tokyo when I was two and a half. I
obtained BA and MA at International
Christian University, studying representation theory and
combinatorics with
Professor Hiroshi
Suzuki. I first went back to
Recife Brazil in 2016 with my mother
(photos: 1
2
3
4
5).
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