Nagano Koichi

J-GLOBAL         Last updated: Jan 16, 2020 at 02:40
Nagano Koichi
University of Tsukuba
Faculty of Pure and Applied Sciences
Job title
Assistant Professor

Research Areas


Academic & Professional Experience

Feb 2007
Assistant Professor, Institute of Mathematics, University of Tsukuba
Apr 2001
Jan 2007
Research Associate, Mathematical Institute, Tohoku University
Apr 2004
Mar 2006
Postdoctoral Fellow for Research Abroad, 2004 JSPS
Jan 2000
Mar 2001
Doctoral Fellow (DC2), 2000 JSPS


Apr 1992
Mar 1996
Department of Mathematics, Faculty of Science and Technology, Waseda University
Apr 1998
Mar 2001
Mathematics, Graduate School of Mathematics, Kyushu University
Apr 1996
Mar 1998
Mathematics, Grtaduate School of Mathematics, Kyushu University

Published Papers

Lytchak, Alexander;Nagano, Koichi
Geometric and Functional Analysis   29(1) 295-342   2019   [Refereed]
We study geometric and topological properties of locally compact, geodesically complete spaces with an upper curvature bound. We control the size of singular subsets, discuss homotopical and measure-theoretic stratifications and regularity of the ...
Free construction of CAT(1) spaces
Nagano, Koichi
Archiv der Mathematik   88 173--180   Jan 2007   [Refereed]
Fixed point sets of parabolic isometries of CAT(0)-spaces
Fujiwara, Koji;Nagano, Koichi;Shioya, Takashi
Commentarii Mathematici Helvetici   81 305--335   Jan 2006   [Refereed]
The asymptotic cones of manifolds of roughly non-negative radial curvature
Mashiko, Yukihiro;Nagano, Koichi;Otsuka, Kazuo
Journal of the Mathematical Society of Japan   57 55--68   Jan 2005   [Refereed]
A sphere theorem for 2-dimensional CAT(1)-spaces
Nagano, Koichi
Pacific Journal of Mathematics   206 401--423   Jan 2002   [Refereed]
A volume convergence theorem for Alexandrov spaces with curvature bounded above
Nagano, Koichi
Mathematisches Zeitschrift   241 127--163   Jan 2002   [Refereed]
Asymptotic rigidity of Hadamard 2-spaces
Nagano, Koichi
Journal of the Mathematical Society of Japan   52 699--723   Jan 2000   [Refereed]

Books etc

On Geometry of Spaces with Curvature Bounded Above
Mar 2001   

Research Grants & Projects

Geometric topology of spaces with an upper curvature bound
Grant-in-Aid for Scientific Research
Project Year: Apr 2009 - Mar 2012
Study of Topological Structure of Metric Spaces of Non-Positive Curvature
Grant-in-Aid for Scientific Research
Project Year: Apr 2006 - Mar 2009