Pythagorean fuzzy soft RMS approach to decision making and medical diagnosis

In this paper, we propose the idea of a root-mean-square-threshold or RMS-threshold for the Pythagorean fuzzy soft set (PFSS). In light of this new concept, we characterized the RMS-level soft set in order to provide additional rationale for decision-making using Pythagorean fuzzy soft information. Moreover, we propose the concept of a weighted Pythagorean fuzzy soft set (WPFSS) with two-tuple weights and talk about its utility for decision-making issues. We initially stretch out the RMS approach to diagnosing numerous patients with different diseases with WPFSS data.