Results 61 to 70 of about 147 (142)
Surjective isometries of C*-algebras: complex spectrum and periodicity
Concrete OperatorsIn this paper, we are interested in studying surjective isometries of C*-algebras with an emphasis on their complex spectrum. We do not require the isometries to be linear nor the C*-algebras to be unital.
Bénéteau Catherine +6 more
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Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014 In this paper, using the boundary properties of the analytic functions we investigate the structure of the discrete spectrum of the boundary value problem (0.1)iy1'+q1(x)y2−λy1=ϕ1(x) −iy2'+q2(x)y1−λy2=ϕ2(x),x∈R+$$\matrix{\hfill {iy_1^\prime + q_1 \left ...
Karaman Özkan
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Radius preserving (semi) regularities in banach algebras
, 2019 In this note we investigate regularities (semiregularities) R and S in a Banach algebra A satisfying S ⊂ R and the corresponding spectra σS and σR satisfyingsup{|λ| : λ ∈ σ R(a)g = sup{|λ| : ∈ 2 σ S(a)}for all a ∈ A.Mathematics Subject Classification ...
Raubenheimer, H, Swartz, A
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On the regularized trace of a fourth order regular differential equation, Int
, 2020 We shall obtain a formula for the regularized trace of a fourth order regular differential equation. Mathematics Subject Classification: 34L05, 47A10 Keywords: Asymptotics of eigenvalues and eigenfunctions, unitary matrix, regularized trace. STATEMENT OF
Azad Bayramov +4 more
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Spectral properties of generalized eigenparameter dependent discrete Sturm-Liouville type equation
, 2017 Let L denote the non-selfadjoint difference operator of second order with boundary condition generated in ℓ2 (ℕ) byan-1yn-1 + bnyn + anyn+1 = λyn ; n ∈ ℕ; (0.1)pΣk=0 (y1γk + y0βk) λk = 0; (0.2)where {an} n∈ℕ and {bn} n∈ℕ are complex ...
Mohapatra, R. N. +4 more
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© Hindawi Publishing Corp. ON THE LARGEST ANALYTIC SET FOR CYCLIC OPERATORS
, 2002 We describe the set of analytic bounded point evaluations for an arbitrary cyclic bounded linear operator T on a Hilbert space ; some related consequences are discussed.
A. Bourhim
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Resolvent and Scattering Matrix at the Maximum of the Potential [PDF]
, 2008 2000 Mathematics Subject Classification: 35P25, 81U20, 35S30, 47A10, 35B38.We study the microlocal structure of the resolvent of the semiclassical Schrödinger operator with short range potential at an energy which is a unique non-degenerate global ...
Ramond, Thierry +2 more
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Study of weighted elliptic composition operators on the unit ball of ℂN
Concrete OperatorsWe study the general properties, point spectrum and spectrum of a weighted composition operator Wm,φ{W}_{m,\varphi } with elliptic symbol φ\varphi on the unit ball BN{{\mathbb{B}}}_{N} of CN{{\mathbb{C}}}^{N}, and general weight m∈Hol(BN)m\in {\rm{Hol}}\
Oger Lucas
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Semigroup estimates and fast-slow dynamics in parabolic-hyperbolic systems
Advances in Nonlinear Analysis, 2018 We present a general procedure to describe slow dynamics in parabolic-hyperbolic systems, under suitable assumptions on the terms appearing in the equations. In particular, our strategy relies in semigroup estimates for the evolution system associated to
Strani Marta
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Spectral mapping theorems for the upper Weyl and upper Browder spectra
, 2018 We discuss the spectral mapping properties of the upper Weyl and upper Browder spectra of an arbitrary ordered Banach algebra element.Mathematics Subject Classication (2010): 46H05, 47A10, 47B65.Key words: Fredholm theory, upper Weyl spectrum, upper ...
Benjamin, Ronalda
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