Title |
Director in General |
Research Fields, Keywords |
Algebraic Analysis |
Homepage URL |
OSHIMA Toshio
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Graduating School 【 display / non-display 】
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1967.04-1971.06
The University of Tokyo Faculty of Science Graduated
Graduate School 【 display / non-display 】
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1971.07-1973.03
The University of Tokyo Graduate School, Division of Science Master's Course Completed
Campus Career 【 display / non-display 】
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2021.04-Now
Josai UniversityCenter of Mathematical and Data Sciences Director in General
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2013.04-2021.03
Josai UniversityFaculty of Science Department of Mathematics Professor
External Career 【 display / non-display 】
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2013.06
The University of Tokyo Professor Emeritus
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1992.04-2013.03
The University of Tokyo Graduate School of Mathematical Sciences Professor
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1987.04-1992.03
The University of Tokyo Faculty of Science Professor
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1983.10-1987.03
The University of Tokyo Faculty of Science Associate Professor (as old post name)
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1978.09-1980.05
Institute for Advances Study, Princeton Researcher
Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display 】
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Algebraic Analysis
Papers 【 display / non-display 】
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Versal unfolding of irregular singularities of a linear differential equation on the Riemann sphere
Toshio Oshima
Publ. RIMS Kyoto Uinv. ( 京都大学数理解析研究所 ) [Refereed] [Invited]
Single Author
For a linear ordinary differential equation with unramified irregular singularities we examine a realization of the equation as a confluence of singularities of a Fuchsian differential equation with the same index of rigidity as the original equation. The Fuchsian equation has the singular points as holomorphic parameters.
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A characterization of the monodromy group of Gauss hypergeometric equation
Toshio Oshima, Kouhei Shimizu
Josai Mathematical Monographs ( 城西大学 ) [Refereed]
Single Author
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Confluence and versal unfolding of Pfaffian systems
Toshio Oshima
Josai Mathematical Monographs ( 城西大学 ) [Refereed]
Single Author
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Semilocal monodromy of rigid local systems
Toshio Oshima
Formal and Analytic Solutions of Diff. Equations, Springer Proceedings in Mathematics and Statistics [Refereed] [Invited]
Single Author
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Transformation of KZ type equations
Toshio Oshima
Microlocal Analysis and Singular Perterbation Theory, RIMS Kokyuroku Bessatsu [Refereed]
Single Author
Books 【 display / non-display 】
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MSJ Memoirs 28, Fractional calculus of Weyl algebra and Fuchsian differential equations
Toshio Oshima (Part: Single Author )
Mathematical Society of Japan ISBN: 978-4864970167
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Grant-in-Aid for Scientific Research(C)
Project Year: 2018.04 - 2023.03
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Grant-in-Aid for Scientific Research(C)
Project Year: 2018.04 - 2021.03
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Grant-in-Aid for Scientific Research(C)
Project Year: 2015.04 - 2018.03
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Grant-in-Aid for Scientific Research(S)
Project Year: 2015.04 - 2017.03 Investigator(s): Takashi Tsuboi
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Grant-in-Aid for Scientific Research(B)
Project Year: 2013.04 - 2018.03
Presentations 【 display / non-display 】
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Singularities of first order nonlinear partial differential equations and contact geometry
[Invited]
Global Study of Differential Equations in the Complex Domain 2013.09 - 2013.09
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Some fundamental lemmas for linear ordinary differential equations
[Invited]
Global Study of Differential Equations in the Complex Domain 2013.09 - 2013.09
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Linear differential equations on the Riemann sphere
Formal and Analytic Differential, Difference and Discrete Equations 2013.08 - 2013.08
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Linear differential equations on the Riemann sphere
Various Aspects on the Painleve Equations 2012.11 - 2012.11
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Linear differential equations on the Riemann sphere and special functions
Representation Seminar 2012.10 - 2012.10
Social Contribution 【 display / non-display 】
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2021.08
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2020.09
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2019.07
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2019.07
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2018.05