TY - JOUR AU - Eun Young Lee TI - A completely hyperexpansive completion problem for weighted shifts on directed trees with one branching vertex JO - Filomat PY - 2023 SP - 4047 VL - 37 IS - 12 UR - http://geodesic.mathdoc.fr/articles/10.2298/FIL2312047L/ DO - 10.2298/FIL2312047L LA - en ID - 10_2298_FIL2312047L ER -