An interval-valued Pythagorean trapezoidal fuzzy multi-criteria decision making technique for psychiatric disorder diagnosisShubhendu Mandal, Kamal Hossain Gazi, Bibhas C. Giri, Sohail Salahshour and Sankar Prasad MondalRAIRO-Oper. Res., 59 6 (2025) 3851-3889DOI: https://doi.org/10.1051/ro/2025147