Abstract
We propose a very weak type of generalized distances called a weak τ-function and use it to weaken the assumptions about lower semicontinuity in existing versions of Ekeland’s variational principle and equivalent formulations.
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Khanh, P.Q., Quy, D.N. On generalized Ekeland’s variational principle and equivalent formulations for set-valued mappings. J Glob Optim 49, 381–396 (2011). https://doi.org/10.1007/s10898-010-9565-1
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DOI: https://doi.org/10.1007/s10898-010-9565-1