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Materias / palabras clave: Bibliography; Perturbation (astronomy); Linear operators; Perturbation theory (quantum mechanics); Mathematics; Computer science; Calculus (dental); Library science; Physics; Mathematical analysis; Medicine; Quantum mech...

Materias / palabras clave: Mathematics; Linear operators; Characterization (materials science); Pure mathematics; Operator theory; Algebra over a field; Applied mathematics; Mathematical analysis; Physics; Optics; Bounded function

We study the Heil-Ramanathan-Topiwala conjecture in L^p spaces by reformulating it as a fixed point problem. This reformulation shows that a function with linearly dependent time-frequency translates has a very rigid str...

The sufficient conditions of convergence for a class of multi-parameter iterativeaggregation methods are established. These conditions do not contain the requirements ofpositivity for the operators and aggregating functi...

Objectives: Rotating or night shifts elicit rapid changes in physiology which the body cannot quickly adapt. In addition, alterations in shift work influence social and familial aspects that ultimately impact the quality...

Let H be a Hilbert space, L(H) the algebra of bounded linear operators on H and W ∈ L(H) a positive operator such that W^1/2 is in the p-Schatten class, for some 1 ≤ p < ∞. Given A,B ∈ L(H) with closed range and ...

In this paper, we develop a systematic framework for studying fixed-point theory in the setting of normed GE-algebras. Building on the GE-norm, we introduce and analyze nonexpansive mappings, α-averaged mappings, and en...

Abstract The rapid growth of the ageing population in medium-sized cities presents increasing challenges for the provision of inclusive public transport systems. This study examines the accessibility and service quality ...

“The mathematical inequality which in quantum mechanics gives rise to the uncertainty principle between two non commuting operators is used to develop a spatial step-size selection algorithm for the Split-Step Fourier ...

In a complete theory there is an element corresponding to each element of reality. A sufficient condition for the reality of a physical quantity is the possibility of predicting it with certainty, without disturbing the ...

A theory of superconductivity is presented, based on the fact that the interaction between electrons resulting from virtual exchange of phonons is attractive when the energy difference between the electrons states involv...

Materias / palabras clave: linear operators, operators on function spaces, mathematics, analysis; Science: Mathematics