Abstract We propose an alternating direction method of multiplier for approximation solution of the unilateral obstacle problem with the biharmonic operator. We introduce an auxiliary unknown and augmented Lagrangian functional to deal with the inequality constrained. and we deduce a constrained minimization problem that is equivalent to a saddle-point problem. Then the alternating di... https://ntnkmif55wgvg.blog2freedom.com/34914065/oviposition-behaviour-of-four-ant-parasitoids-hymenoptera-braconidae-euphorinae-neoneurini-and-ichneumonidae-hybrizontinae-with-the-description-of-three-new-european-species