On the boundary of weighted numerical ranges
classification
🧮 math.FA
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numericalrangeweightedmatricesrangesarticleboundariesboundary
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In this article, we are going to introduce the weighted numerical range which is a further generalization both the c-numerical range and the rank k numerical range. If the boundaries of weighted numerical ranges of two matrices (possibly of different sizes) overlap at sufficiently many points, then the two matrices share common generalized eigenvalues.
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