Results 31 to 40 of about 456,012 (313)
Joint Numerical Range of Matrix Polynomials [PDF]
Al-Rafidain Journal of Computer Sciences and Mathematics, 2009 Some algebraic properties of the sharp points of the joint numerical range of a matrix polynomials are the main subject of this paper. We also consider isolated points of the joint numerical range of matrix polynomials.
Ahmed Sabir
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Numerical ranges of KMS matrices [PDF]
Acta Scientiarum Mathematicarum, 2013 A KMS matrix is one of the form $$J_n(a)=[{array}{ccccc} 0 & a & a^2 &... & a^{n-1} & 0 & a & \ddots & \vdots & & \ddots & \ddots & a^2 & & & \ddots & a 0 & & & & 0{array}]$$ for $n\ge 1$ and $a$ in $\mathbb{C}$.
Gau, Hwa-Long, Wu, Pei Yuan
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On Birkhoff – James and Roberts orthogonality
Special Matrices, 2018 In this paper we present some recent results on characterizations of the Birkhoff-James and the Roberts orthogonality in C*-algebras and Hilbert C*-modules.
Arambašic Ljiljana, Rajic Rajna
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Canopy height model and NAIP imagery pairs across CONUS
Scientific DataCanopy height models (CHM) provide detailed environmental vertical structure information and are an important indicator and input for ecological and geospatial applications.
Brady W. Allred +2 more
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H-joint numerical ranges [PDF]
Bulletin of the Australian Mathematical Society, 2002 The notion of the joint numerical range of several linear operators with respect to a sesquilinear form is introduced. Geometrical properties of the joint numerical range are studied, in particular, convexity and angle points, in connection with the algebraic properties of the operators. The main focus is on the finite dimensional case.
Li, Chi-Kwong, Rodman, Leiba
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Pediatric patients with extracranial solid tumors (ST) receiving chemotherapy are at an increased risk for Pneumocystis jirovecii pneumonia (PJP). However, evidence guiding prophylaxis practices in this population is limited. A PJP‐related fatality at our institution highlighted inconsistent prescribing approaches and concerns about
Kriti Kumar +8 more
wiley +1 more source
Sickle Cell Disease Is an Inherent Risk for Asthma in a Sibling Comparison Study
Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction Sickle cell disease (SCD) and asthma share a complex relationship. Although estimates vary, asthma prevalence in children with SCD is believed to be comparable to or higher than the general population. Determining whether SCD confers an increased risk for asthma remains challenging due to overlapping symptoms and the ...
Suhei C. Zuleta De Bernardis +9 more
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Numerical Range and Quadratic Numerical Range for Damped Systems
, 2017 We prove new enclosures for the spectrum of non-selfadjoint operator matrices associated with second order linear differential equations $\ddot{z}(t) + D \dot{z} (t) + A_0 z(t) = 0$ in a Hilbert space. Our main tool is the quadratic numerical range for which we establish the spectral inclusion property under weak assumptions on the operators involved ...
Jacob, Birgit +3 more
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Linear Algebra and its Applications, 2015 Let \(H\) be a separable complex Hilbert space and let \(B(H)\) be the Banach algebra of all bounded linear operators on \(H\). The numerical range of \(S\in B(H)\) is the set \(W(S)=\left\{(Sx,x):\; ||x||\; =1\right\}\). It is known that the spectrum \(\sigma (S)\) of \(S\) is contained in \(W(S)\). In this paper, the authors define a more general set,
Bracic, J., Diogo, C.
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Pseudo Numerical Ranges and Spectral Enclosures
Complex Analysis and Operator Theory, 2022 AbstractWe introduce the new concepts of pseudo numerical range for operator functions and families of sesquilinear forms as well as the pseudo block numerical range for $$n\!\times \! n$$ n × n ...
Borbala Gerhat, Christiane Tretter
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