K. Umezu

发表

Positivity results for indefinite sublinear elliptic problems via a continuity argument

H. R. Quoirin, U. Kaufmann, K. Umezu, 2016, 1610.07872.

Effect of primordial magnetic field on seeds for large scale structure

H. Hanayama, K. Ichiki, D. Yamazaki, 2006, astro-ph/0611910.

Uniqueness of a positive solution for the Laplace equation with indefinite superlinear boundary condition

K. Umezu, 2021, Journal of Differential Equations.

The logistic elliptic equation with the nonlinear boundary condition arising from coast fishery harvesting

K. Umezu, 2022, 2202.09442.

The logistic elliptic equation with the nonlinear boundary condition arising from coast fishery harvesting

K. Umezu, 2022, 2202.09442.

Logistic elliptic equation with a nonlinear boundary condition arising from coastal fishery harvesting

K. Umezu, 2022, Nonlinear Analysis: Real World Applications.

-Approach to Mixed Boundary Value Problems for Second-Order Elliptic Operators

K. Umezu, 2009 .

Nonnegative solutions of an indefinite sublinear Robin problem I: positivity, exact multiplicity, and existence of a subcontinuum

U. Kaufmann, K. Umezu, Humberto Ramos Quoirin, 2020, Annali di Matematica Pura ed Applicata (1923 -).

An indefinite concave-convex equation under a Neumann boundary condition I

K. Umezu, Humberto Ramos Quoirin, 2017, Israel Journal of Mathematics.

Positive steady states of an indefinite equation with a nonlinear boundary condition: existence, multiplicity, stability and asymptotic profiles

K. Umezu, Humberto Ramos Quoirin, 2016, Calculus of Variations and Partial Differential Equations.

Selective inhibitors of germination of legume seeds in activated sludge compost

T. Ando, K. Kouno, T. Nagaoka, 1996, Plant Growth Regulation.

Uniqueness and positivity issues in a quasilinear indefinite problem

Uriel Kaufmann, Humberto Ramos Quoirin, Kenichiro Umezu, 2020, Calculus of Variations and Partial Differential Equations.

Nonnegative solutions of an indefinite sublinear Robin problem II: local and global exactness results

U. Kaufmann, K. Umezu, Humberto Ramos Quoirin, 2020, Israel Journal of Mathematics.

Nonnegative solutions of an indefinite sublinear Robin problem I: positivity, exact multiplicity, and existence of a subcontinuum

U. Kaufmann, K. Umezu, Humberto Ramos Quoirin, 2019 .

Observational constraints on accelerating brane cosmology with exchange between the bulk and brane

T. Kajino, G. Mathews, M. Yahiro, 2005, astro-ph/0507227.

Cosmological constraints on Newton's constant

M. Yahiro, K. Ichiki, K. Umezu, 2005, astro-ph/0503578.

An elliptic equation with an indefinite sublinear boundary condition

K. Umezu, Humberto Ramos Quoirin, 2016 .

Positive steady states of an indefinite equation with a nonlinear boundary condition: existence, multiplicity, stability and asymptotic profiles

K. Umezu, Humberto Ramos Quoirin, 2015, 1509.01753.

Bifurcation for a logistic elliptic equation with nonlinear boundary conditions: A limiting case

H. R. Quoirin, K. Umezu, 2015 .

Global structure of supercritical bifurcation with turning points for the logistic elliptic equation with nonlinear boundary conditions

K. Umezu, 2013 .

Bifurcation approach to a logistic elliptic equation with a homogeneous incoming flux boundary condition

K. Umezu, 2012 .

On eigenvalue problems with Robin type boundary conditions having indefinite coefficients

Kenichiro Umezu, K. Umezu, 2006 .

MULTIPLICITY OF POSITIVE SOLUTIONS UNDER NONLINEAR BOUNDARY CONDITIONS FOR DIFFUSIVE LOGISTIC EQUATIONS

K. Umezu, 2004, Proceedings of the Edinburgh Mathematical Society.

Behavior and stability of positive solutions of nonlinear elliptic boundary value problems arising in population dynamics

Kenichiro Umezu, K. Umezu, 2002 .

Global positive solution branches of positone problems with nonlinear boundary conditions

Kenichiro Umezu, K. Umezu, 2000, Differential and Integral Equations.

Global bifurcation results for semilinear elliptic boundary value problems with indefinite weights and nonlinear boundary conditions

K. Umezu, 2010 .

Uniqueness and sign properties of minimizers in a quasilinear indefinite problem

H. R. Quoirin, U. Kaufmann, K. Umezu, 2020, Communications on Pure & Applied Analysis.

Past and recent contributions to indefinite sublinear elliptic problems

H. R. Quoirin, U. Kaufmann, K. Umezu, 2020, 2004.01284.

Positive solutions of a forced nonlinear elliptic boundary value problem

K. Umezu, 1999 .

Multiplicity of positive solutions to semilinear elliptic boundary value problems

K. Umezu, 1999 .

A curve of positive solutions for an indefinite sublinear Dirichlet problem

H. R. Quoirin, U. Kaufmann, K. Umezu, 2017, Discrete & Continuous Dynamical Systems - A.

Nonnegative solutions of an indefinite sublinear Robin problem II: local and global exactness results

U. Kaufmann, K. Umezu, Humberto Ramos Quoirin, 2021, Israel Journal of Mathematics.

Nonnegative solutions of an indefinite sublinear elliptic problem: positivity, exact multiplicity, and existence of a subcontinuum

H. R. Quoirin, U. Kaufmann, K. Umezu, 2019, 1901.04019.

Loop Type Subcontinua of Positive Solutions for Indefinite Concave-Convex Problems

U. Kaufmann, K. Umezu, Humberto Ramos Quoirin, 2017, Advanced Nonlinear Studies.

An indefinite concave-convex equation under a Neumann boundary condition II

K. Umezu, Humberto Ramos Quoirin, 2017, 1703.04229.

An indefinite concave-convex equation under a Neumann boundary condition I

K. Umezu, Humberto Ramos Quoirin, 2016, Israel Journal of Mathematics.

A loop type component in the non-negative solutions set of an indefinite elliptic problem

H. R. Quoirin, K. Umezu, 2016, 1610.00964.

Logistic elliptic equation with a nonlinear boundary condition arising from coastal fishery harvesting II

K. Umezu, Kenichiro Umezu, 2023, Journal of Mathematical Analysis and Applications.

The effects of indefinite nonlinear boundary conditions on the structure of the positive solutions set of a logistic equation

H. R. Quoirin, K. Umezu, 2014 .

Bifurcation from Infinity for Asymptotically Linear Elliptic Eigenvalue Problems

K. Umezu, 2002 .

Positive solutions of sublinear elliptic boundary value problems

K. Umezu, Kazuaki Taira, 1997 .