PA Ejegwa,
S Wen, Y Feng, W Zhang, J Liu - Applied Intelligence, 2023 - Springer
… Now, we present some statistical correlation coefficients under Pythagorean fuzzy
environment. Let S = {s 1 ,s 2 ,⋯ ,s n } for \(n<\infty \), and M and N be arbitrary PFSs in S. …