【摘要】 对于c∈Cn和A∈Mn（C），记Hck（A）为A的带有完全对称函数的c－数值域．给出了在复平面上Hck（A）是线段的必要条件和是单点集的充分必要条件．更多还原

【Abstract】 For c∈Cn and A∈Mn(C), denote by Hck(A) the c- numerical range of A with the completely symmetric function Ck. A necessary condition for Hck(A) to be a line segment in the complex plane and necessary and sufficient conditions for Hck(A) to be a singleton set are given.更多还原