Rchr
J-GLOBAL ID：200901058640611215   Update date: Aug. 09, 2024

UMEZU Kenichiro

ウメヅ ケンイチロウ | UMEZU Kenichiro
Affiliation and department：
Ibaraki University Department of Mathematics

About Ibaraki University Department of Mathematics


Job title： Professor
Other affiliations (2)：
Homepage URL  (1)： http://umeken.sakura.ne.jp/kenwiki/index.php
Research field  (1)： Mathematical analysis
Research keywords  (1)： nonlinear elliptic boundary value problem, eigenvalue problem, positive solution, bifurcation analysis, variational approach, degree theory, sub- and supersolutions, population dynamics.
Research theme for competitive and other funds  (12)：
  • 2023 - 2026 沿岸漁業収穫に由来する非線形境界条件の下でのロジスティック楕円型境界値問題の研究
  • 2018 - 2024 特異性を伴う混合型非線形楕円型境界値問題における非自明解集合の大域的構造の研究
  • 2015 - 2018 符号不定係数と混合型非線形性を伴う楕円型境界値問題の正値解の分岐構造に関する研究
  • 2010 - 2013 人口動態論に由来する吸収爆発混合型の非線形楕円型境界値問題の分岐解析
  • 2009 - 2012 Development of representation of elastic waves and investigation of their fundamental properties
Show all
Papers (48)：
  • Kenichiro Umezu. Logistic elliptic equation with a nonlinear boundary condition arising from coastal fishery harvesting II. Journal of Mathematical Analysis and Applications. 2024. 534. 1. 128134
  • Kenichiro Umezu. Logistic elliptic equation with a nonlinear boundary condition arising from coastal fishery harvesting. Nonlinear Analysis: Real World Applications. 2023. 70. 103788
  • Kenichiro Umezu. Uniqueness of a positive solution for the Laplace equation with indefinite superlinear boundary condition. Journal of Differential Equations. 2023. 350. 124-151
  • Uriel Kaufmann, Humberto Ramos Quoirin, Kenichiro Umezu. Nonnegative solutions of an indefinite sublinear Robin problem II: local and global exactness results. Israel Journal of Mathematics. 2022. 247. 661-696
  • Uriel Kaufmann, Humberto Ramos Quoirin, Kenichiro Umezu. Uniqueness and positivity issues in a quasilinear indefinite problem. Calculus of Variations and Partial Differential Equations. 2021. 60. article number 187
ｍore...
MISC (3)：
  • Uriel Kaufmann, Humberto Ramos Quoirin, Kenichiro Umezu. Past and recent contributions to indefinite sublinear elliptic problems. Rendiconti dell'Istituto di Matematica dell'Università di Trieste. 2020. 52. 1. 217-241
  • Humberto Ramos Quoirin, Kenichiro Umezu. An indefinite superlinear elliptic equation with a nonlinear boundary condition of sublinear type. Sūrikaisekikenkyūsho Kōkyūroku. 2016. 2006. 2006. 68-88
  • Kenichiro Umezu. Semilinear elliptic boundary value problems in chemical reactor theory (Japanese). Sūrikaisekikenkyūsho Kōkyūroku. 1998. 1025. 99-117
Lectures and oral presentations  (77)：
  • Positive solutions for logistic type elliptic equation with a non Lipschitz boundary condition arising in coastal fishery harvesting
    (Equadiff2024 in Karlstad 2024)
  • Positive solutions for some sublinear Robin problem with an indefinite weight
    (The Friday Seminar of Ibaraki University 2023)
  • An exact multiplicity result for some sublinear Robin problem with an indefinite weight
    (The 13th AIMS Conference on Dynamical Systems, Differential Equations and Applications in Wilmington NC 2023)
  • Logistic elliptic equations with the nonlinear boundary condition arising in coast fishery harvesting
    (The Applied Mathematical Analysis Seminar of Tohoku University 2022)
  • Uniqueness of a positive solution for the Laplace equation with indefinite superlinear boundary conditions: near a critical case
    (The South Osaka Applied Mathematics Seminar 2021)
ｍore...
Education (2)：
  • 1988 - 1993 University of Tsukuba Graduate School, Division of Mathematics
  • 1984 - 1988 University of Tsukuba First Cluster of College College of Natural Sciences
Professional career (1)：
  • Doctor of Mathematics (University of Tsukuba)
Work history (8)：
  • 2024/04 - 現在 Department of Mathematics, Ibaraki University Professor
  • 2012/04 - 2024/03 Faculty of Eduation, Ibaraki University Professor
  • 2008/04 - 2012/03 Faculty of Education, Ibaraki University Associate Professor
  • 2007/04 - 2008/03 Maebashi Institute of Technology Associate Professor
  • 2001/04 - 2007/03 Maebashi Institute of Technology Associate Professor
Show all
Awards (1)：
  • 2003/08 - The International Society for Analysis, its Applications and Computation The ISAAC Award for Young Scientists
Association Membership(s) (2)：
日本応用数理学会 ,  日本数学会
※ Researcher’s information displayed in J-GLOBAL is based on the information registered in researchmap. For details, see here.

Return to Previous Page

TOP

BOTTOM