Vectorial form of Ekeland variational principle with applications to vector equilibrium problems
Suliman S. Al-Homidan, Qamrul Hasan Ansari, G. Kassay · Optimization · 2019
We first derive an Ekeland type variational principle for vector-valued bifunctions without assuming triangular inequality for bifunctions. Then, by using such variational principle, we derive some existence results for solutions of vector equilibrium problems and vector quasi-equilibrium problems.