Browsing by Subject "Compression"
Now showing items 1-3 of 3
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LIMITED APPROXIMATION OF NUMERICAL RANGE OF NORMAL MATRIX
(2010)Let A be an n x n normal matrix, whose numerical range NR[A] is a k-polygon. If a unit vector v is an element of W subset of C(n), with dimW = k and the point v*Av is an element of IntNR[A], then NR[A] is circumscribed to ... -
On numerical ranges of the compressions of normal matrices
(2011)For an n x n normal matrix A, whose numerical range NR[A] is a k-polygon (k <= n), an n x (k - 1) isometry matrix P is constructed by a unit vector upsilon is an element of C(n), and NR[P*AP] is inscribed to NR[A]. In this ... -
Trends in Healthy Life Years Between 2005 and 2019 in 31 European Countries: The Compression or Expansion of Morbidity?
(Swiss School of Public Health, 2024)Objectives: Our objective was to assess morbidity trends in Europe and to classify European countries based on population ageing theories: the compression, expansion and dynamic equilibrium of morbidity.Methods: The ...