0^j&dZddlmZmZddlZdZy)a This module calculates the reduction ratio for trust-region methods. Translated from Zaikun Zhang's modern-Fortran reference implementation in PRIMA. Dedicated to late Professor M. J. D. Powell FRS (1936--2015). Python translation by Nickolai Belakovski. ) DEBUGGINGREALMAXNctr|dk\sJtj|rt }ntj|s|dkr|dkDr|dz }nlt }ndtj|rtj|rd}n7tj|rtj |rt }n||z }trtj|rJ|S)zh This function evaluates the reduction ratio of a trust-region step, handling inf/nan properly. rr)rnpisnanrisposinfisneginf)aredpredrshrinkratios o/var/www/ramen.bs-engineer-server.com/venv/lib/python3.12/site-packages/scipy/_external/pyprima/common/ratio.pyredratrs !||  xx~ $419 !8AIEHE T r{{40 T r{{40T 88E?"" L)__doc__constsrrnumpyrrrrrs'(r