{"id":23139,"library":"passagemath-coxeter3","title":"passagemath-coxeter3","description":"Passagemath interface to coxeter3: Coxeter groups, Bruhat ordering, Kazhdan-Lusztig polynomials. Version 10.8.4 requires Python >=3.11, <3.15.","status":"active","version":"10.8.4","language":"python","source_language":"en","source_url":"https://github.com/passagemath/passagemath","tags":["coxeter-groups","bruhat-order","kazhdan-lusztig","passagemath","sage"],"install":[{"cmd":"pip install passagemath-coxeter3","lang":"bash","label":"Install via pip"}],"dependencies":[{"reason":"Core passagemath environment required for Coxeter group functionality","package":"passagemath-sage","optional":false}],"imports":[{"note":"SageMath interface removed in passagemath; use passagemath namespace.","wrong":"from sage.interfaces.coxeter3 import Coxeter3","symbol":"Coxeter3","correct":"from passagemath.coxeter3 import Coxeter3"}],"quickstart":{"code":"from passagemath.coxeter3 import Coxeter3\ncox = Coxeter3('H3')\nw = cox.from_reduced_word([1,2,1,3])\nprint(w.length())","lang":"python","description":"Create a Coxeter group of type H3, construct an element from a reduced word, and print its length."},"warnings":[{"fix":"Install passagemath-coxeter3 and import from passagemath.coxeter3.","message":"The coxeter3 interface is no longer part of SageMath; you must use passagemath packages.","severity":"breaking","affected_versions":">=10.0"},{"fix":"Ensure coxeter3 binary is available on $PATH or installed via system package manager.","message":"The coxeter3 system must be separately installed (e.g., via conda or system package). pip install only installs the Python interface.","severity":"gotcha","affected_versions":"all"}],"env_vars":null,"last_verified":"2026-05-01T00:00:00.000Z","next_check":"2026-07-30T00:00:00.000Z","problems":[{"fix":"Use 'from passagemath.coxeter3 import Coxeter3' instead.","cause":"Importing from SageMath namespace after migration to passagemath.","error":"ModuleNotFoundError: No module named 'sage.interfaces.coxeter3'"},{"fix":"Install coxeter3 binary (e.g., 'conda install -c conda-forge coxeter3' on Linux).","cause":"The coxeter3 shared library is not installed or not in LD_LIBRARY_PATH.","error":"ImportError: libcoxeter3.so: cannot open shared object file"}],"ecosystem":"pypi","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null}