[HN] What Is the Numerical Range of a Matrix?
[HN] What Is the Numerical Range of a Matrix?
nhigham.com What Is the Numerical Range of a Matrix?
The numerical range of a matrix $latex A\in\mathbb{C}^{n\times n}$, also known as the field of values, is the set of complex numbers $latex W(A) = \biggl\{\, \displaystyle\frac{z^*Az}{z^*z}: 0\ne z…
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