Results 21 to 30 of about 66,031 (239)
On a Numerical Radius Preserving Onto Isometry on L(X)
Journal of Function Spaces, 2016 We study a numerical radius preserving onto isometry on L(X). As a main result, when X is a complex Banach space having both uniform smoothness and uniform convexity, we show that an onto isometry T on L(X) is numerical radius preserving if and only if ...
Sun Kwang Kim
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Sensors, 2022 The accurate perception of straightness of a scraper conveyor is important for the construction of intelligent working faces in coal mines. In this paper, we propose a precision compensation model based on rotation error angle to improve the accuracy of ...
Yang Song +6 more
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The Ising model with long-range interactions
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2015 The phase transition in the two-dimensional and three-dimensional Ising models with long-range spin interactions are studied with the Monte-Carlo method. The interaction region between spins is characterized by the radius $R$.
Alexander A Biryukov, Yana V Degtyarova
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Matricial Radius: A Relation of Numerical radius with Matricial Range
, 2019 It has been shown that if $T$ is a complex matrix, then {\small\begin{align*} ω(T)&=\frac{1}{n}\sup\left\{|\mathrm{Tr}\ X|;\ X\in W^n(T)\right\}\\ &=\frac{1}{n}\sup\left\{\|X\|_1;\ X\in W^n(T)\right\}\\ &= \sup\left\{ ω(X);\ X\in W^n(T)\right\} \end{align*} } where $n$ is a positive integer, $ω(T)$ is the numerical radius and $W^n(T)$ is ...
Dehghani, Mahdi +2 more
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Testing Method for the Range of Fracture Zone of Rock Slope under Blasting Load
Shock and Vibration, 2021 In engineering blasting, the determination of the range of rock blasting fracture zone has important guiding significance for blasting construction. This paper proposes a method that can accurately and directly obtain the range of rock blasting fracture ...
Zhide Wang +6 more
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Schur product of matrices and numerical radius (range) preserving maps
Linear Algebra and its Applications, 2007 Let \(M_n\) (resp., \(H_n)\) be the algebra of \(n\)-by-\(n\) complex matrices (resp., Hermitian matrices). The numerical range \(W(A)\) and numerical radius \(w(A)\) of \(A\) in \(M_n\) are given by \[ W(A)=\{x^*Ax: x\in\mathbb{C}^n,x^*x=1\}\quad\text{and} \quad w(A)=\max\{|\lambda|: \lambda\in W(A)\}, \] respectively.
Li, Chi-Kwong, Poon, Edward
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ON NUMERICAL RADIUS INEQUALITIES FOR OPERATOR PRODUCTS IN HILBERT SPACES
Проблемы анализаWe establish several numerical radius inequalities for products of two operators on a Hilbert space. Some of the obtained inequalities improve well-known results. More precisely, we show that if 𝐴, 𝐵 \in 𝐵(𝐻) double commute, then 𝑤(𝐴𝐵)
Ahmed Elbarbouchi +1 more
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Flow interference of two side-by-side square cylinders using IB-LBM – Effect of corner radius
Results in Physics, 2018 In this study, a two-dimensional Immersed Boundary Lattice Boltzmann Method (IB-LBM) is employed to investigate computationally effect of flow past a pair of square cylinders in side-by-side arrangement at Re=100, for various corner radii.
Ehsan Adeeb +2 more
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Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants [PDF]
Serbian Astronomical Journal, 2009 The publication of new tables of calibration of some fundamental parameters of Galactic B0-B5 supergiants in the two classes $I_mathrm{a}$ and $I_mathrm{b} $ allows to particularize the eight parameters conjecture that model five fundamental ...
Zaninetti, L.
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AxiomsThis paper develops Kato-type inequalities for bounded operators on Hilbert spaces by using the Moore–Penrose inverse of closed range operators. The results extend classical forms of Kato’s inequality to products involving a closed range operator and ...
Najla Altwaijry +1 more
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