An application of variational methods to Dirichlet boundary value problem with impulses
The authors consider the impulsive Dirichlet boundary value problem \[ \begin{aligned} &-u''(t) + \lambda u(t) = f(t,u(t)) + p(t), \quad t \in [0,T], \\ &\triangle u'(t_j) = I_j(u(t_j)),\;j = 1,\dots,k, \\ &u(0) = u(T) = 0, \end{aligned} \] where \(0 < t_1 < \dots < t_k < T\) are impulse instants, the impulsive functions \(I_j : {\mathbb R} \to {\mathbb R}\) and the right-hand side \(f\) are continuous, \(p \in L^2[0,T]\), \(\lambda > -\pi^2/T^2\). Sufficient conditions for the existence of at least one and infinitely many weak solutions are found. The proofs are based on the critical points theory.
scientific article; zbMATH DE number 5656638
scientific article