most citedHarmonic oscillators at resonance, perturbed by a non-linear friction force

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math.AP2020

Existence and uniqueness of solutions for a class of -Laplace equations on a ball

Philip Korman

For a class of equations generalizing the model case \[ Δ_p u-a(r)u^{p-1}+b(r)u^q=0 \; \; \mbox{in }, \; \; u=0 \; \; \mbox{on }, \] where is the unit ball in $R…

math.AP2016

On the perturbed Gelfand equation from combustion theory

Philip Korman, Yi Li, Tiancheng Ouyang

For the perturbed Gelfand's equation on the unit ball in two dimensions, Y. Du and Y. Lou [4] proved that the curve of positive solutions is exactly -shaped, for sufficiently sm…

math.AP2016

Non-existence of solutions for non-autonomous elliptic systems of Hamiltonian type

Philip Korman

We extend the classical Pohozaev's identity to semilinear elliptic systems of Hamiltonian type, providing a simpler approach, and a generalization, of the results of E. Mitidieri […

math.AP2016

A global solution curve for a class of periodic problems, including the relativistic pendulum

Philip Korman

Using continuation methods, we study the global solution structure of periodic solutions for a class of periodically forced equations, generalizing the case of relativistic pendulu…

math.AP2016

A global solution curve for a class of free boundary value problems arising in plasma physics

Philip Korman

We study the existence and multiplicity of solutions and the global solution curve of the following free boundary value problem, arising in plasma physics, see R. Temam [18], and H…

math.AP2016

Regularization of radial solutions of -Laplace equations, and computations using infinite series

Philip Korman

We consider radial solutions of equations with the -Laplace operator in . We introduce a change of variables, which in effect removes the singularity at . While soluti…