@article{Zhou2022, 
author = {Wei Zhou and Jianrong Wu},
title = {Ekeland's variational principle in fuzzy quasi-normed spaces},
year = {2022},
journal = {AIMS Mathematics},
volume = {7},
number = {9},
pages = {15982-15991},
keywords = {fuzzy quasi-norm, variational principle, fixed point theorem, minimization theorem},
url = {https://www.sciopen.com/article/10.3934/math.2022874},
doi = {10.3934/math.2022874},
abstract = {Fuzzy quasi-normed space provides an ideal mathematical framework for studying asymmetric phenomena. In this paper, we prove a version of the Ekeland variational principle in fuzzy quasi-normed spaces and apply it to Caristi's fixed point theorem and Takahashi minimization theorem. Moreover, we prove the equivalence relations among these theorems.}
}