Hiroyuki Usami

On a singular elliptic boundary value problem in a ball

Hiroyuki Usami · Nonlinear Analysis · 1989 · 36 citations

Free Boundary Problem, Elliptic Equation, Geometric Partial Differential Equation +1

Some oscillation theorems for a class of quasilinear elliptic equations

Hiroyuki Usami · Annali di Matematica Pura ed Applicata (1923 -) · 1998 · 30 citations · Full text

Monge-ampere Equation, Elliptic Equation, Oscillation Theorems +4

Oscillation theory for a class of second order quasilinear ordinary differential equations with application to partial differential equations

Takaŝi Kusano, Akio Ogata, Hiroyuki Usami · Japanese journal of mathematics · 1993 · 28 citations · Full text

Numerical Analysis, Partial Differential Equations, Oscillation Theory +4

Nonexistence Results of Positive Entire Solutions for Quasilinear Elliptic Inequalities

Yūki Naito, Hiroyuki Usami · Canadian Mathematical Bulletin · 1997 · 28 citations · Full text

Elliptic Equation, Engineering, Functional Analysis +8

Positive solutions of a class of second order semilinear elliptic equations in the plane

Taka i Kusano, Hiroyuki Usami · Mathematische Annalen · 1984 · 23 citations

Monge-ampere Equation, Elliptic Equation, Positive Solutions +2