ftj(dZddlmZmZddlZdZdS)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|dksJtj|r t }ntj|s|dkr|dkr|dz }njt }natj|rtj|rd}n6tj|rtj|r t }n||z }trtj|rJ|S)zh This function evaluates the reduction ratio of a trust-region step, handling inf/nan properly. rr)rnpisnanrisposinfisneginf)aredpredrshrinkratios ]/var/www/html/CA-Chatbot/venv/lib/python3.11/site-packages/scipy/_lib/pyprima/common/ratio.pyredratrs !||||  x~~ $4199 !88AIEEHEE T  r{400 T  r{400T #8E??""" L)__doc__constsrrnumpyrrrrrsN'&&&&&&&(((((r