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Pythagorean fuzzy set: state of the art and future directions

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Abstract

Pythagorean fuzzy set, generalized by Yager, is a new tool to deal with vagueness considering the membership grade \(\mu \) and non-membership \(\nu \) satisfying the condition \(\mu ^2+\nu ^2\le 1\). It can be used to characterize the uncertain information more sufficiently and accurately than intuitionistic fuzzy set. Pythagorean fuzzy set has attracted great attention of many scholars that have been extended to new types and these extensions have been used in many areas such as decision making, aggregation operators, and information measures. Because of such a growth, we present an overview on Pythagorean fuzzy set with aim of offering a clear perspective on the different concepts, tools and trends related to their extension. In particular, we provide two novel algorithms in decision making problems under Pythagorean fuzzy environment. It may be served as a foundation for developing more algorithms in decision making.

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Acknowledgements

The authors are very appreciative to the reviewers for their precious comments which enormously ameliorated the quality of this paper. Our work is sponsored by the National Natural Science Foundation of China (No. 61462019), the General Project of Shaoguan University (No. SY2016KJ11).

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  1. School of Information Science and Engineering, Shaoguan University, Shaoguan, 512005, Guangdong, China

    Xindong Peng

  2. Faculty of Business and Information Science, UCSI University, Jalan Menara Gading, Cheras, 56000, Kuala Lumpur, Malaysia

    Ganeshsree Selvachandran

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Correspondence to Xindong Peng.

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Peng, X., Selvachandran, G. Pythagorean fuzzy set: state of the art and future directions. Artif Intell Rev 52, 1873–1927 (2019). https://doi.org/10.1007/s10462-017-9596-9

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