TY - 数学物理学报(英文版) A1 - Xiaojun HUANG T1 - REVISITING A NON-DEGENERACY PROPERTY FOR EXTREMAL MAPPINGS Y1 - 2021-12-25 JF - Acta Mathematica Scientia JO - 数学物理学报(英文版) SP - 1829 EP - 1838 VL - 41 IS - 6 UR - http://121.43.60.238/sxwlxbB N1 - 10.1007/s10473-021-0602-6 ER -