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- W1997376677 abstract "Let A be an n×n matrix. By Donoghue's theorem, all corner points of its numerical range W(A) belong to the spectrum σ(A). It is therefore natural to expect that, more generally, the distance from a point p on the boundary ∂W(A) of W(A) to σ(A) should be in some sense bounded by the radius of curvature of ∂W(A) at p. We establish some quantitative results in this direction." @default.
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- W1997376677 date "2001-01-01" @default.
- W1997376677 modified "2023-09-28" @default.
- W1997376677 title "On eigenvalues and boundary curvature of the numerical range" @default.
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- W1997376677 doi "https://doi.org/10.1016/s0024-3795(00)00231-7" @default.
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