This paper deals with the existence of solutions to equilibrium and quasi-equilibrium problems without any convexity assumption. Coverage includes some equivalences to the Ekeland variational principle for bifunctions and basic facts about transfer lower continuity. An application is given to systems of quasi-equilibrium problems.

中文翻译：

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基于埃克兰变分原理的拟平衡问题的存在结果

本文讨论了没有任何凸性假设的均衡和准均衡问题的解的存在性。覆盖范围包括双函数的 Ekeland 变分原理的一些等价物以及关于传递下级连续性的基本事实。给出了对准平衡问题系统的应用。