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This paper deals with the local nonsolvability of several examples of linear and nonlinear partial differential equations (PDE).. We hope that some illustrative examples in
Waltman, Existence and uniqueness of solutions of boundary value problems for two-dimensional systems of nonlinear differential
Kusano, Asymptotic behavior of nonoscillatory solutions of nonlinear functional differential equations of neutral type, Funkcial.. Kitamura, Oscillation of functional
In the last decades, there has been an increasing interest in obtaining sufficient conditions for the oscillation and/or nonoscillation of solutions of second order linear and
Some authors have used fixed point the- orems to show the existence of positive solutions to boundary value problems for ordinary differential equations, difference equations,
He, Double positive solutions of three-point boundary value problems for p-Laplacian dynamic equations on time scales, J. Raffoul, Positive solutions of nonlinear functional
Okrasi´ nski, Uniqueness of solutions for a class of nonlin- ear Volterra integral equations with convolution kernel, Math.. Okrasi´ nski, Nonlinear Volterra integral equations
That is, some authors have used fixed point theorems to show the existence of pos- itive solutions to boundary value problems for ordinary differential equations, difference