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Abstract
We deal with a resonant boundary value problem involving a second-order differential
equation with periodic boundary conditions. First, we modify the problem at
resonance and consider an equivalent nonresonant boundary value problem.
Next, we obtain sufficient conditions for the existence of solutions of the
modified boundary value problem, using fixed-point theory. Consequently, these
conditions suffice for the existence of solutions of the original boundary value
problem. We demonstrate the applicability of established results through
examples.
Keywords
boundary value problem, resonance, shift, Green's function,
fixed point, existence
Mathematical Subject Classification 2010
Primary: 34B15
Secondary: 34B27
Milestones
Received: 21 March 2019
Revised: 5 April 2019
Accepted: 20 September 2019
Published: 4 February 2020
Communicated by Hari Mohan Srivastava