minimax method meaning in English

极大极楔

In chapter two , we prove the existence and multiplicity results of some nonlinear biharmonic equations by using lower scmicontinuity method and minimax method
在第二章中，通过下半连续方法和极大极小方法，我们证明了一类非线性双调和方程解的存在性和多解性的结论
Some solvability conditions of periodic solutions are obtained for a class of first order superquadratic non - autonomous hamiltonian systems in light of the minimax methods of critical point theory
摘要运用临界点理论中的极小、极大方法得到一类超二次哈密顿系统的周期解的存在性的存在性定理。