What's new
 8 May 2016:
The 18th Takagi Lectures are to be held at the Graduate School of Mathematical Sciences,
the University of Tokyo on 56 November 2016.
 24 March 2016:
Dr. Salma Nasrin has been appointed as a Professor of Mathematics at the University of Dhaka, commencing 21 March 2016.
 24 March 2016:
Mr. Masatoshi Kitagawa (D3), Mr. Alex Leontiev (M2), and Mr. Naoya Shimamoto (M2) have been awarded the Graduate School of Mathematical Sciences Director's Prize of the academic year 2015.
 7 March 2016:
Dr. Yuichiro Tanaka (JSPS Research Fellow PD, Kyushu Univ.) has been appointed as an assistant professor at the University University of Tokyo, commencing 1 April, 2016.
 30 January 2016:
Dr. Toshihisa Kubo has been appointed as a lecturer at Ryukoku University, commencing 1 April.
 30 January 2016:
The 17th Takagi Lectures are to be held at RIMS, Kyoto University on 18 (Sat) June 2016.
 3 November 2015
Mr. Naoya Shimamoto (M2) has been appointed as a JSPS Research Fellow (DC1) of the academic year 2016.
 20 February 2015:
Dr. Fanny Kassel has been awarded the CNRS Bronze Medal 2015.
 11 February 2015:
Dr. Jan Möllers is to be appointed as an junior professor at Erlangen University (starting from September 2015).
 24 September 2014:
Dr. Yukio Koriyama has been promoted to associate professor at l'École Polytechnique.
 24 December 2013:
Dr. Takayuki Okuda (PD)
has been appointed as an assistant professor at the Department of Mathematics, the Graduate School of Science, Hiroshima University, commencing 1 April 2014.
 30 October 2013:
Mr. Yosuke Morita (M2) has been appointed as JSPS Research Fellow (DC1) of the academic year 2014.
 31 March 2013:
Mr. Yoshiki Oshima (D3)
has been appointed as a Kavli Fellow, commencing 1 April.
 16 February 2013:
I am staying at Tata Institute of Fundamental Research, Mumbai to give Panorama Lectures as a Mathematics Year Event celebrating the 125th birthday of Ramanujan.
 1 October 2012:
Leading Graduate School Doctoral Program:
The Leading Graduate Course for Frontiers of Mathematical Sciences and Physics (FMSP)
has been adpted.
 18 March 2011:
Professor Yves Benoist
is to be awarded
Clay Research Award.
 31 December 2010:
Dr. Atsumu Sasaki has been appointed as a tenured lecturer at Tokai University, commencing 1 April.
 31 December 2010:
Dr. Taro Yoshino has been appointed as an associate professor at the University of Tokyo, commencing 1 April.
 Log
Forthcoming events
Invited lectures
 910 June 2016:
Branching problems and symmetry breaking operators (opening lecture).
Journées SL2R (Strasbourg, Lorraine, Luxembourg, Reims):
THEORIE DES REPRESENTATIONS ET ANALYSE HARMONIQUE,
Institut Elie Cartan de Lorraine
(IECL, UMR CNRS 7502), France.
[ full info ]
 2829 June 2016:
Global Geometry and Analysis on Locally Symmetric Spaces with Indefinitemetric.
Analysis on Manifolds with Symmetries and Related Structures, University of Bath, UK.
[ full info ]
 1822 July 2016:
TBA.
Conference on Geometry, Representation Theory and the BaumConnes
Conjecture, the Fields Institute, Toronto, Ontario, Canada.
[ full info ]
 1518 September 2016:
Birth of new branching problems.
MSJ Autumn Meeting 2016. Kansai University, Japan.
[ full info ]
 27 May2 June 2017:
TBA.
Conference in honor of Alexandre Kirillov's 80th birthday. France.
 1925 June 2017:
TBA.
XII. International Workshop "Lie Theory and Its Applications in Physics", Varna, Bulgaria.
Conferences organized
Course lectures
 2016 summer，Tuesdays 13:0014:45:
Geometry XD / Frontiers of Mathematical Sciences and Physics IV, the University of Tokyo
 2016 summer，Thursdays 8:3010:15:
Intro to Mathematical Sciences I (for nonscience students), Undergraduate course at the University of Tokyo
Intensive lectures at the University of Tokyo
 Prof. Hidenori Fujiwara (Kinki University), 610 June 2016
Seminar
Postdocs, students & visitors
GCOE
Kavli IPMU
Academic service
 Managing Editor, Japanese
Journal of Mathematics (2005 )
 Editor, Geometriae
Dedicata (2000 )
 Editor, International
Mathematics Research Notices (2002 )
 Editor, International
Journal of Mathematics (2004 )
 Editor, Kyoto Journal of Mathematics (2010 )
 Editor, Journal of Mathematical Sciences, The University of Tokyo (2007 )
 Editor, Advances in Pure and Applied Mathematics (2008 )
 Editor, Journal of Lie Theory, (2012 )
 Editor, Representation Theory (American Mathematical Society), (2015 )
 Editor, Translations of Mathematical Monographs, Amer. Math. Soc. (Feb 2016Jan 2020)
 Editor of Kodaira Centennial Issue (2015)
 Editor in Chief, Journal
of Mathematical Society of Japan (20022004; 20042006), Editor (19982006)
 Editor, Publications
RIMS (20032007)
 Editor, International
Mathematics Research Papers (20052008)
Contact
Publications
Papers (selected)

(with F. Kassel) Poincaré series for nonRiemannian
locally symmetric spaces, Advances in Mathematics 287 (2016),
123236, Published online: 20NOV2015.
DOI:
10.1016/j.aim.2015.08.029. arXiv:
1209.4075.
[ full info ]

A program for branching problems in the representation
theory of real reductive groups, Representations of Lie Groups: In Honor of
David A. Vogan, Jr. on his 60th Birthday (M. Nevins and P. Trapa,
eds.), Progress in Mathematics, vol. 312, Birkhäuser, 2015,
pp. 277322, DOI:
10.1007/9783319234434_10. arXiv:
1509.08861. ISBN: 978331923442.
[ full info ]

(with T. Oshima) Finite multiplicity theorems for induction and restriction, Advances in Mathematics, 248 (2013), 921944.
[ full info ]

(with G. Mano) The Schrödinger model for the minimal
representation of the indefinite orthogonal group O(p,q), Mem. Amer. Math.
Soc. 212, no. 1000, vi+132 pp., (published online first, on 4 February 2011).
[ full info ]
 Visible actions on symmetric spaces, Transformation Groups, 12 (2007), 671694.
[ full info ]
 (with G. Mano), The inversion formula and holomorphic extension of the minimal representation of the conformal group, in Harmonic Analysis, Group Representations, Automorphic Forms and Invariant Theory: In Honour of Roger E. Howe, Singapore University Press and World Scientific Publishing, 2007, pp. 159223.
[ full info ]
 (with T. Yoshino), Compact CliffordKlein forms of symmetric spaces: revisited, Pure
and Appl. Math. Quarterly 1 (2005), 603684, Special Issue: In Memory
of Professor Armand Borel.
[ full info ]
 Multiplicityfree representations and visible actions on complex
manifolds, Publ. RIMS 41 (2005), 497549, special issue
commemorating the fortieth anniversary of the founding of RIMS.
[ full info ]
 (with B. Ørsted),
Analysis on minimal representations of O(p,q),
Part I — Realization and conformal geometry,
Adv. Math. 180 (2003), 486512 [ full info ];
Part II — Branching laws,
Adv. Math. 180 (2003), 513550 [ full info ];
Part III — Ultrahyperbolic equations on R^{p1,q1},
Adv. Math. 180 (2003), 551595. [ full info ]
 Branching problems of unitary representations, Proc. of ICM,
Beijing 2002, 2 (2002), 615627.
[ full info ]
 Discrete decomposability of the restriction of A_{q}(λ)
with respect to reductive subgroups III: restriction of HarishChandra
modules and associated varieties, Inventiones Mathematicae 131
(1998), 229256.
[ full info ]
 Discrete decomposability of the restriction of A_{q}(λ)
with respect to reductive subgroups II: microlocal analysis and asymptotic
Ksupport, Annals of Math. 147 (1998), 709729.
[ full info ]
 Invariant measures on homogeneous manifolds of reductive type, J.
reine und angew. Math. 490 (1997), 3753.
[ full info ]
 Discrete decomposability of the restriction of A_{q}(λ)
with respect to reductive subgroups and its applications, Invent. Math.
117 (1994), 181205.
[ full info ]
 A necessary condition for the existence of compact CliffordKlein forms
of homogeneous spaces of reductive type, Duke Math. J. 67 (1992),
653664.
[ full info ]
 Proper action on a homogeneous space of reductive type, Math. Ann.
285 (1989), 249263.
[ full info ]
Books (selected)
 T. Kobayashi and B. Speh, Symmetry breaking for representations of rank one orthogonal groups, vol. 238, Memoirs of American Mathematical Society, no. 1126, 2015, Published electronically May 12, 2015. 118 pp.
[ full info ]
 T. Kobayashi and G. Mano, The Schrödinger model for the minimal representation of the indefinite orthogonal group O(p,q), Mem. Amer. Math. Soc. 212, no. 1000, 2011, vi+132 pp.
[ full info ]
 T. Kobayashi, Multiplicityfree theorems of the restrictions of unitary highest weight modules with respect to reductive symmetric pairs, in Representation Theory and Automorphic Forms (T. Kobayashi, W. Schmid, and J.H. Yang, eds.), Progress in Mathematics 255, Birkhäuser, 2007.
[ full info ]
 A. Borel, L. Ji, and T. Kobayashi, Lie Theory: Unitary Representations and Compactifications of Symmetric Spaces, (J.P. Anker and B. Ørsted, eds.), Progress in Mathematics 229, Birkhäuser, 2005, 207 pp.
[ full info ]
 T. Kobayashi and T. Oshima, Lie Groups and Representations, Iwanami, 2005, 610 pp (in Japanese).
[ full info ]
 T. Kobayashi, Discontinuous groups for nonRiemannian homogeneous spaces,
in Mathematics Unlimited — 2001 and Beyond (B. Engquist and W. Schmid, eds.),
SpringerVerlag, 2000.
[ full info ]
 T. Kobayashi, Singular Unitary Representations and Discrete Series for Indefinite Stiefel Manifolds U(p, q; F)/U(p m, q; F), Memoirs of the Amer. Math. Soc. 462, 1992, 106 pp.
[ full info ]
Complete lists of publications
Other lists
Lectures
Invited lectures (selected)
 Conference in honor of Paul F. Baum's 80th birthday, Toronto, Canada (2016)
 Conference in honor of R. Howe's 70th birthday, Yale, USA (2015)
 Conference in honor of D. Vogan's 60th birthday, MIT, USA (2014)
 Panorama Lectures in celebration of 125th birthday of Srinivasa Ramanujan, India (2013)
 Colloquium Lorrain, France (2012)
 Conference in honor of M. Eastwood's 60th birthday, Vienna, Austria (2012)
 Conference in memory of Souriau, AixenProvence, France (2012)
 Conference in honor of I. Frenkel's 60th birthday, Yale, USA (2012)
 Conference in honor of J. Wolf's 75th birthday, Bochum, Germany (2012)
 Conference in honor of Helgason's 85th birthday, Boston, USA (2012)
 Conference in honor of M. Ragnathan's 70th birthday, Tata, India (2011)
 Chern Centennial Conference, USA (2011)
 Colloquium, Chicago University, USA (2011)
 Oka Symposium, Japan (2010)
 Geometry and Quantum Theory, the Netherlands (2010)
 Conference in honor of J. Vargas' 60th birthday, Argentina (2009)
 Conference in honor of G. Zuckerman's 60th birthday, USA (2009)
 Mathematische Arbeitstagung, Germany (2009)
 Conference in honor of B. Ørsted's 60th birthday (opening lecture),
Germany (2009)
 Colloquium, Yale University, USA (2009)
 Conference in honor of T. Oshima's 60th birthday, Japan (2009)
 Conference, Representations of Lie groups and applications, France (2008)
 The Monna Lectures, Netherlands (2008)
 Conference in honor of JeanLouis Clerc, France (2008)
 Number Theory Seminar, Harvard University, USA (2008)
 Colloquium, Harvard University, USA (2008)
 Conference in honor of S. Helgason's 80th birthday, Iceland (2007)
 Conference in honor of T. Sunada's 60th birthday, Japan (2007)
 Conference at MaxPlanckInstitut für Mathematik, Bonn (closing lecture), Germany (2007)
 Seminar Sophus Lie in honor of E. B. Vinberg's 70th birthday (opening lecture), Germany (2007)
 Summer Solstice Days, Institut de Mathématiques de Jussieu, France (2007)
 Sackler Distinguished Lectures in Pure Mathematics, Israel (2007)
 Conference in honor of H. Abels, Germany (2006)
 Conference in honor of R. Howe's 60th birthday (opening lecture), Singapore (2006)
 Conference in honor of R. Parthasarathy's 60th birthday, India (2006)
 Asian Mathematical Congress, Singapore (2005)
 Seminar Sophus Lie in honor of Jacques Faraut, France (2005)
 PanAfrican Congress of Mathematicians (plenary address), Tunisia (2004)
 Conference in honor of G. van Dijk's 65th birthday, Netherlands (2004)
 Conference, Lie groups and representation theory (closing lecture), Denmark (2004)
 ICM 2002, Beijing, China (2002)
 Winter School on Geometry and Physics, Czech Republic (2002)
 Conference on Integral Geometry at MSRI, Berkeley, USA (2001)
 Harvard University (series lectures), USA (2001)
 European School on Group Theory (series lectures), Denmark (2000)
 Summer Solstice Days, Université de Paris 6 & 7, France (1999)
 Annual meeting of the Mathematical Society of Japan (Spring Award), Japan (1999)
 Göttingen Colloquium, Germany (1999)
 Seminar Sophus Lie, Germany (1999)
 Round Table in Global PseudoRiemannian Geometry, Nancy, France (1998)
 Conference on Analysis on Lie groups and homogeneous spaces, Denmark (1997)
 The Gelfand Seminar, USA (1997)
 Summer Solstice Days, Université de Paris 6 & 7, France (1996)
 Annual Meeting of Swedish Mathematical Society, Lund, Sweden (1995)
 European School on Group Theory (series lectures), Denmark (1994)
 Workshop in honor of S. Helgason's 65th birthday, Denmark (1992)
 Conference ''75 years of Radon transform'', Vienna, Austria (1992)
 Colloquium at Columbia University, USA (1992)
 Conference on Harmonic analysis on Lie groups, Denmark (1991)
Complete lists of invited lectures
Other lists
© Toshiyuki Kobayashi