We studied boundary value problem of fourth-order impulsive differential equations involving oscillatory nonlinear term. Infinitely many nonnegative, distinct, classical solutions are obtained by using minimum value theory. Moreover, the proof that the weak solution is the classic solution is supplemented.
"Infinitely many periodic solutions for fourth-order impulsive differential equation with oscillatory nonlinear term." Rocky Mountain J. Math. 50 (5) 1833 - 1851, October 2020. https://doi.org/10.1216/rmj.2020.50.1833