The Investigation of Some Essential Concepts of Extended Fuzzy-Valued Convex Functions and Their Applications

Autor: T. Allahviranloo, M. R. Balooch Shahryari, O. Sedaghatfar, M. R. Shahriari, R. Saadati, S. Noeiaghdam, U. Fernandez-Gamiz
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Advances in Fuzzy Systems, Vol 2024 (2024)
Druh dokumentu: article
ISSN: 1687-711X
DOI: 10.1155/2024/8335864
Popis: In this paper, we are thus motivated to define and introduce the extended fuzzy-valued convex functions that can take the singleton fuzzy values −∞˜ and +∞˜ at some points. Such functions can be characterized using the notions of effective domain and epigraph. In this way, we study important concepts such as fuzzy indicator function and fuzzy infimal convolution for extended fuzzy-valued functions. Finally, we introduce the concept of directional generalized derivative for extended above functions and its properties. Eventually, we give a practical example that will illustrate well the directional g-derivative for the extended fuzzy-valued convex function.
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