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On Invariant Subspaces for the Shift Operator [PDF]
Symmetry, 2019 In this paper, we improve two known invariant subspace theorems. More specifically, we show that a closed linear subspace M in the Hardy space H p ( D ) ( 1 ≤ p < ∞ ) is invariant under the shift operator M z on H p ( D ) if and only if it is hyperinvariant under M z , and that a closed linear subspace M in the Lebesgue space L 2 ( ∂ D ) is reducing
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On the phase-shift formula for the scattering operator [PDF]
, 1965 Teruo Ikebe
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A note on the Sheffer shift operator
Journal of Mathematical Analysis and Applications, 1990 AbstractEach surjective derivation on the algebra of formal power series can be given in a simple form. An operator on the vector space of polynomials in a single variable is constructed such that the Sheffer polynomials are its eigenvectors; furthermore, some known examples are quoted.
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The Ruelle operator for symmetric $��$-shifts
, 2019 Consider $m \in \mathbb{N}$ and $ \in (1, m + 1]$. Assume that $a\in \mathbb{R}$ can be represented in base $ $ using a development in series $a = \sum^{\infty}_{n = 1}x(n) ^{-n}$ where the sequence $x = (x(n))_{n \in \mathbb{N}}$ take values in the alphabet $\mathcal{A}_m := \{0, \ldots, m\}$. The above expression is called the $ $-expansion of $a$
Lopes, Artur O., Vargas, Victor
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Shift operator techniques for the classification of multipole–photon states. X. P 0l eigenstate and eigenvalue determination in G2 [PDF]
, 1982 H. E. De Meyer +2 more
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Shift operators and their classification
We introduce a class of linear bounded invertible operators on Banach spaces, called shift operators, which comprises weighted backward shifts and models finite products of weighted backward shifts and dissipative composition operators. We classify vast families of these shift operators, including the ones generated by orthogonal, diagonalizable ...
Carvalho, Maria +2 more
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The Relation between Shift Lengths and Occupational Fatigue Dimensions in Filling Station Operators
International Journal of Occupational Hygiene, 2015 Shift work is a common work schedule that has several inappropriate consequences, the most important of which is fatigue. The aim of this study was to invest gate the impact of the shift length on the occupatio al fatigue of operators in filling stations.
MASOUD SHAFIEE MOTLAGH +4 more
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