Abstract
We consider nonlinear scalar equations with causal mappings. These equations include differential, differential-delay, integral, integro-differential, difference and other traditional equations. Conditions that provide the existence of positive solutions are established. The suggested approach enables us to consider various classes of equations from the unified point of view.
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This research was supported by the Kamea Fund of the Israel
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Gil’, M.I. Positive Solutions of Equations with Nonlinear Causal Mappings. Positivity 11, 523–535 (2007). https://doi.org/10.1007/s11117-007-2076-8
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DOI: https://doi.org/10.1007/s11117-007-2076-8