Updated on 2024/01/05

写真a

 
OKUMA Tomohiro
 
Title
Professor
Contact information
メールアドレス

Research Areas

  • Natural Science / Geometry

Graduating School

  • University of the Ryukyus, Faculty of Science, Department of Mathematics

    1992.03, Graduated

Graduate School

  • University of Tsukuba, Graduate School, Division of Mathematics, Mathematics

    Doctor's Course, 1997.03, Completed

External Career

  • Gunma National College of Technology, Lecturer, 1997.04 - 2005.09

Academic Society Affiliations

  • The Mathematical Society of Japan

 

Research Career

  • Complex surface singularities, 1995.04 -

    Invariants of singularities

Papers

  • NORMAL HILBERT COEFFICIENTS AND ELLIPTIC IDEALS IN NORMAL TWO-DIMENSIONAL SINGULARITIES, NAGOYA MATHEMATICAL JOURNAL, 2022.03

    Okuma Tomohiro, Rossi Maria Evelina, Watanabe Kei-Ichi, Yoshida Ken-Ichi

    Multiple Authorship (Including Foreigners)

  • THE NORMAL REDUCTION NUMBER OF TWO-DIMENSIONAL CONE-LIKE SINGULARITIES, PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 149(11) 4569-4581, 2021.11

    Okuma Tomohiro, Watanabe Kei-ichi, Yoshida Ken-ichi

    Multiple Authorship (Only Japanese)

  • Normal reduction numbers of normal surface singularities, Singularities and Their Interaction with Geometry and Low Dimensional Topology. Trends in Mathematics. , 159-179, 2021

    Tomohiro Okuma

    Single Author

  • WEIGHTED HOMOGENEOUS SURFACE SINGULARITIES HOMEOMORPHIC TO BRIESKORN COMPLETE INTERSECTIONS, JOURNAL OF SINGULARITIES, 23 170-193, 2021

    Okuma Tomohiro

    Single Author

  • Normal Reduction Numbers for Normal Surface Singularities with Application to Elliptic Singularities of Brieskorn Type, Acta Mathematica Vietnamica, 44(1) 87-100, 2019.03

    T. Okuma, Kei-ichi Watanabe, Ken-ichi Yoshida

    Multiple Authorship (Only Japanese)

  • Cohomology of ideals in elliptic surface singularities, Illinois Journal of Mathematics , 61(3-4) 259-273, 2018.08

    T. Okuma

    Single Author

  • A characterization of two-dimensional rational singularities via Core of ideals, J. Algebra, 499 450-468, 2018.04

    T. Okuma, Kei-ichi Watanabe, Ken-ichi Yoshida

    Multiple Authorship (Only Japanese)

  • Analytic singularities supported by a specific integral homology sphere link, Methods and Applications of Analysis , 24(2) 303-320, 2017.06

    A. Nemethi, T. Okuma

    Multiple Authorship (Including Foreigners)

  • A remark on metrically conical surface singularities of Brieskorn type, Saitama Mathematical Journal , 31 137-139, 2017.05

    T. Okuma

    Single Author

  • Rees algebras and $p_g$-ideals in a two-dimensional normal local domain, Proceedings of the American Mathematical Society , 145(1) 39-47, 2017.01

    T. Okuma, Kei-ichi Watanabe, Ken-ichi Yoshida

    Multiple Authorship (Only Japanese)

  • Good ideals and $p_g$-ideals in two-dimensional normal singularities, Manuscripta Mathematica , 150(3-4) 499-520, 2016.07

    T. Okuma, Kei-ichi Watanabe, Ken-ichi Yoshida

    Multiple Authorship (Only Japanese)

  • The multiplicity of abelian covers of splice quotient singularities, Mathematische Nachrichten , 288(2-3) 343-352, 2015.02

    T. Okuma

    Single Author

  • The maximal ideal cycles over complete intersection surface singularities of Brieskorn type, Kyushu Journal of Mathematics , 68 121-137, 2014.03

    Fan-Ning Meng, T. Okuma

    Multiple Authorship (Including Foreigners)

  • Invariants of splice quotient singularities, IRMA Lectures in Mathematics and Theoretical Physics, 20 149-159, 2012.12

    T. Okuma

    Single Author

  • The embedding dimension of weighted homogeneous surface singularities, Journal of Topology , 3(3) 643-667, 2010.08

    Andras Nemethi, Tomohiro Okuma

    Multiple Authorship (Including Foreigners)

  • The geometric genus, the Casson invariant conjecture and splice type singularities, Demonstratio Mathematica , 43(2) 325-338, 2010.05

    Tomohiro Okuma

    Single Author

  • Another proof of the end curve theorem for normal surface singularities, Journal of the Mathematical Society of Japan , 62(1) 1-11, 2010.01

    Tomohiro Okuma

    Single Author

  • On the Casson invariant conjecture of Neumann-Wahl, Journal of Algebraic Geometry, 18(1) 135-149, 2008.12

    Andras Nemethi, Tomohiro Okuma

    Multiple Authorship (Including Foreigners)

  • The geometric genus of splice-quotient singularities, Transactions of the American Mathematical Society, 360(12) 6643-6659, 2008.11

    Tomohiro Okuma

    Single Author

  • The Seiberg-Witten invariant conjecture for splice-quotients, Journal of the London Mathematical Society. Second Series, 78(1) 143-154, 2008.08

    Andras Nemethi, Tomohiro Okuma

    Multiple Authorship (Including Foreigners)

  • Universal abelian covers of certain surface singularities, Mathematische Annalen, 334(4) 753-773, 2006.04

    Tomohiro Okuma

    Single Author

  • Numerical Gorenstein elliptic singularities, Mathematische Zeitschrift, 249(1) 31-62, 2005.01

    Okuma, Tomohiro

    Single Author

  • Universal abelian covers of rational surface singularities, Journal of the London Mathematical Society. Second Series, 70(2) 307-324, 2004.10

    Okuma, Tomohiro

    Single Author

  • On (-P . P)-constant deformations of Gorenstein surface singularities, Commentarii Mathematici Helvetici, 79(3) 647-658, 2004.09

    Okuma, Tomohiro

    Single Author

  • A numerical condition for a deformation of a Gorenstein surface singularity to admit a simultaneous log-canonical model, Proceedings of the American Mathematical Society, 129(10) 2823-2831, 2001.10

    Tomohiro Okuma

    Single Author

  • Simultaneous good resolutions of deformations of Gorenstein surface singularities, International Journal of Mathematics, 12(1) 49-61, 2001.02

    Okuma, Tomohiro

    Single Author

  • The polynomial periodicity of the plurigenera of surface singularities, Saitama Mathematical Journal, 17 7-13, 1999.12

    Okuma, Tomohiro

    Single Author

  • The pluri-genera of surface singularities, The Tohoku Mathematical Journal. Second Series, 50(1) 119-132, 1998.03

    Okuma, Tomohiro

    Single Author

  • The second pluri-genus of surface singularities, Compositio Mathematica, 110(3) 263-276, 1998.02

    Okuma, Tomohiro

    Single Author

  • The plurigenera of Gorenstein surface singularities, Manuscripta Mathematica, 94(2) 187-194, 1997.10

    Okuma, Tomohiro

    Single Author

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Books

  • Plurigenera of surface singularities, Nova Science Publishers Inc., 2000.05

    Okuma, Tomohiro

Review Papers

  • Recent topics on complex surface singularities with a focus on splice quotient singularities, Sugaku, 67(4) 373-393, 2015.10

    Tomohiro Okuma

Grant-in-Aid for Scientific Research

  • Grant-in-Aid for Scientific Research(C)，2021.04 - 2026.03

  • Grant-in-Aid for Scientific Research(C)，2017.04 - 2021.03

  • Grant-in-Aid for Scientific Research(C)，2014.04 - 2017.03

  • Grant-in-Aid for Scientific Research(C)，2011.04 - 2014.03

  • Grant-in-Aid for Scientific Research(C)，2008.04 - 2011.03

  • Grant-in-Aid for Young Scientists(B)，2006.04 - 2008.03

  • Grant-in-Aid for Young Scientists(B)，2004.04 - 2006.03

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