Nonresonance conditions on the potential for a second-order periodic boundary value problem
Nonresonance conditions on the potential for a second-order periodic boundary value problem
We consider the periodic problem<disp-formula content-type="math/mathml">\[<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="StartLayout 1st Row negative u equals f left-parenthesis u right-parenthesis plus h left-parenthesis t right-parenthesis comma 2nd Row u left-parenthesis 0 right-parenthesis equals u left-parenthesis 2 pi right-parenthesis comma u prime left-parenthesis 0 right-parenthesis equals u prime left-parenthesis 2 pi right-parenthesis comma EndLayout"><mml:semantics><mml:mtable …