학술논문
The Gau-Wang-Wu conjecture on partial isometries holds in the 5-by-5 case
Document Type
Working Paper
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Subject
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Abstract
Gau, Wang and Wu in their LAMA'2016 paper conjectured (and proved for $n\leq 4$) that an $n$-by-$n$ partial isometry cannot have a circular numerical range with a non-zero center. We prove that this statement holds also for $n=5$.
Comment: 10 pages
Comment: 10 pages