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The concepts of interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy subalgebras, interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy ideals, and interval-valued ∈ ∨ κ ∗ ˜ , q κ ˜ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy ideals are introduced, and related properties are studied. Many examples are given in support of these new notions. Furthermore, interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy commutative ideals are defined, and some important properties are discussed. For a BCK-algebra X , it is proved that every interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy commutative ideal of BCK-algebra X is an interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy ideal of X , but the converse need not be true, in general, and then a counterexample is constructed.
The concepts of interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy subalgebras, interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy ideals, and interval-valued ∈ ∨ κ ∗ ˜ , q κ ˜ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy ideals are introduced, and related properties are studied. Many examples are given in support of these new notions. Furthermore, interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy commutative ideals are defined, and some important properties are discussed. For a BCK-algebra X , it is proved that every interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy commutative ideal of BCK-algebra X is an interval-valued ∈ , ∈ ∨ κ ∗ ˜ , q κ ˜ -fuzzy ideal of X , but the converse need not be true, in general, and then a counterexample is constructed.
In this paper, we investigate the multi-criteria decision-making complications under intuitionistic fuzzy hypersoft set (IFHSS) information. The IFHSS is a proper extension of the intuitionistic fuzzy soft set (IFSS) which discusses the parametrization of multi-sub attributes of considered parameters, and accommodates more hesitation comparative to IFSS utilizing the multi sub-attributes of the considered parameters. The main objective of this research is to introduce operational laws for intuitionistic fuzzy hypersoft numbers (IFHSNs). Additionally, based on developed operational laws two aggregation operators (AOs), i.e., intuitionistic fuzzy hypersoft weighted average (IFHSWA) and intuitionistic fuzzy hypersoft weighted geometric (IFHSWG), operators have been presented with their fundamental properties. Furthermore, a decision-making approach has been established utilizing our developed aggregation operators (AOs). Through the established approach, a technique for solving decision-making (DM) complications is proposed to select sustainable suppliers in sustainable supply chain management (SSCM). Moreover, a numerical description is presented to ensure the validity and usability of the proposed technique in the DM process. The practicality, effectivity, and flexibility of the current approach are demonstrated through comparative analysis with the assistance of some prevailing studies.
Parameter reduction is an important operation for improving the performance of decision-making processes in various uncertainty theories. The theory of N-soft sets is emerging as a powerful mathematical tool for dealing with uncertainties beyond the standard formulation of the soft set theory. In this research article, we extend the notion of parameter reduction to N-soft set theory, and we also justify its practical calculation. To this purpose, we define related theoretical concepts (e.g. N-soft subset, reduct N-soft set and redundant parameter) and examine some of their fundamental properties. Then, we argue that the idea of attributes reduction from the rough set theory cannot be employed in the N-soft set theory in order to reduce the number of parameters. Consequently, we take an original position in order to adequately define and compute parameter reductions in N-soft sets. Finally, we develop an application of parameter reduction of N-soft sets.
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