Research Paper Fuzzy sets and their variants
1. Fuzzy programming approach to Bi-level linear programming problems

Eshetu Dadi Gurmu; Tagay Takele Fikadu

Volume 1, Issue 4 , Autumn 2020, Pages 268-290

http://dx.doi.org/10.22105/jfea.2020.262326.1069

Abstract
  In this study, we discussed a fuzzy programming approach to bi-level linear programming problems and their application. Bi-level linear programming is characterized as mathematical programming to solve decentralized problems with two decision-makers in the hierarchal organization. They become more important ...  Read More

Review Paper Fuzzy sets and their variants
2. An overview of data envelopment analysis models in fuzzy stochastic environments

Fatemeh Zahra Montazeri

Volume 1, Issue 4 , Autumn 2020, Pages 291-297

http://dx.doi.org/10.22105/jfea.2020.258330.1030

Abstract
  One of the appropriate and efficient tools in the field of productivity measurement and evaluation is data envelopment analysis, which is used as a non-parametric method to calculate the efficiency of decision-making units. Today, the use of data envelopment analysis technique is expanding rapidly and ...  Read More

Research Paper Intuitionistic fuzzy sets and their variants
3. A study on fundamentals of refined intuitionistic fuzzy set with some properties

Atiqe Ur Rahman; Muhammad Rayees Ahmad; Muhammad Saeed; Muhammad Ahsan; Muhammad Arshad; Muhammad Ihsan

Volume 1, Issue 4 , Autumn 2020, Pages 298-312

http://dx.doi.org/10.22105/jfea.2020.261946.1067

Abstract
  Zadeh conceptualized the theory of fuzzy set to provide a tool for the basis of the theory of possibility. Atanassov extended this theory with the introduction of intuitionistic fuzzy set. Smarandache introduced the concept of refined intuitionistic fuzzy set by further subdivision of membership and ...  Read More

Research Paper Pythagorean fuzzy sets and their variants
4. Interval valued Pythagorean fuzzy ideals in semigroups

Veerappan Chinnadurai; Arul Selvam

Volume 1, Issue 4 , Autumn 2020, Pages 313-322

http://dx.doi.org/10.22105/jfea.2020.252687.1023

Abstract
  In this paper, we define the new notion of interval-valued Pythagorean fuzzy ideals in semigroups and established the properties of its with suitable examples. Also, we introduce the concept of interval valued Pythagorean fuzzy sub-semigroup, interval valued Pythagorean fuzzy left (resp. right) ideal, ...  Read More

Research Paper Pythagorean fuzzy sets and their variants
5. Some similarity measures of rough interval Pythagorean fuzzy sets

V. S. Subha; Dhanalakshmi Dhanalakshmi

Volume 1, Issue 4 , Autumn 2020, Pages 323-333

http://dx.doi.org/10.22105/jfea.2020.262002.1068

Abstract
  In this paper, we expose cosine, jaccard and dice similarity measures and rough interval Pythagorean mean operator. Some of the important properties of the defined similarity measures have been established. Then the proposed methods are applied for solving multi attribute decision making problems. Finally, ...  Read More

Research Paper Spherical fuzzy sets
6. Spherical interval-valued fuzzy bi-ideals of gamma near-rings

Chinnadurai Veerappan; Shakila Venkatesan

Volume 1, Issue 4 , Autumn 2020, Pages 334-343

http://dx.doi.org/10.22105/jfea.2020.259268.1040

Abstract
  In this paper we introduce the concept of the spherical interval-valued fuzzy bi-ideal of gamma near-ring R and its some results. The union and intersection of the spherical interval-valued fuzzy bi-ideal of gamma near-ring R is also a spherical interval-valued fuzzy bi-ideal of gamma near-ring R . Further ...  Read More

Research Paper Neutrosophic sets and their variants
7. K-algebras on quadripartitioned single valued neutrosophic sets

Mohanasundari Mohan; Mohana Krishnaswamy

Volume 1, Issue 4 , Autumn 2020, Pages 344-360

http://dx.doi.org/10.22105/jfea.2020.254945.1026

Abstract
  Abstract Quadripartitioned single valued neutrosophic (QSVN) set is a powerful structure where we have four components Truth-T, Falsity-F, Unknown-U and Contradiction-C. And also it generalizes the concept of fuzzy, initutionstic and single valued neutrosophic set. In this paper we have proposed the ...  Read More