TY - JOUR AU - Colin Defant AU - James Propp TI - Quantifying noninvertibility in discrete dynamical systems JO - The electronic journal of combinatorics PY - 2020 VL - 27 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.37236/9475/ DO - 10.37236/9475 ID - 10_37236_9475 ER -