论文标题
在davis-Wielandt壳的椭圆范围定理上，数值范围和保形范围
On the elliptical range theorems for the Davis-Wielandt shell, the numerical range, and the conformal range
论文作者
论文摘要
共形范围是Davis-Wielandt壳的水平投影，可以视为数值范围的双曲线版本。在这里，我们解释了（类似物）$ 2 \ times2 $复杂矩阵的椭圆范围定理。在该课程中，与Davis-Wielandt外壳和数值范围进行了比较。
The conformal range, which is a horizontal projection of the Davis-Wielandt shell, can be considered as the hyperbolic version of the numerical range. Here we explain (the analogue of) the elliptical range theorem of $2\times2$ complex matrices for the conformal range. In that course, comparison to the Davis-Wielandt shell and the numerical range is made.
