Results 251 to 260 of about 385,913 (283)

Backward Shifts on Double Sequence Spaces

Results in Mathematics, 2017
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Shu, Yonglu, Wang, Wei, Zhao, Xianfeng
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Jℱ-Class Weighted Backward Shifts

International Journal of Bifurcation and Chaos, 2018
In this article [Formula: see text]-class operators are introduced and some basic properties of [Formula: see text]-vectors are given. The [Formula: see text]-class operators include the [Formula: see text]-class operators and [Formula: see text]-class operators introduced by Costakis and Manoussos in 2008.
Shengnan He, Yu Huang, Zongbin Yin
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Forward versus Backward Shift Rotation

Proceedings of the Human Factors Society Annual Meeting, 1989
The U.S. Bureau of Mines has been involved in the study of guidelines for the design of shiftwork schedules. One popular suggestion offered by shiftwork researchers and consultants is to establish schedules that rotate in a forward direction (Day to Afternoon to Nights) rather than backward (Day to Night to Afternoon).
James Duchon, Jon Wagner, Christopher Keran   +2 more
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The Commutant of an Abstract Backward Shift

Canadian Mathematical Bulletin, 2000
AbstractA bounded linear operator T on a Banach space X is an abstract backward shift if the nullspace of T is one dimensional, and the union of the null spaces of Tk for all k ≥ 1 is dense in X. In this paper it is shown that the commutant of an abstract backward shift is an integral domain. This result is used to derive properties of operators in the
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Backward shift invariant spaces in H^2

Indiana University Mathematics Journal, 1997
If \(b\in B(H^\infty)\), the unit ball of \(H^\infty\), then the de Branges-Rovnyak space \({\mathcal H}(b)\) is a Hilbert space contained contractively in \(H^2\) that is invariant by the backward shift operator \(S^*\). When \(b\) is an inner function the invariant subspaces of \({\mathcal H}(b)\) are given by Beurling's theorem and when \(b\) is not
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Nearly invariant and the backward shift

2009
For a \( \mathbb{D} \) function ϑ, form the subspace $$ K_{z\vartheta } : = H^2 \left( \mathbb{D} \right) \cap (z\vartheta H^2 (\mathbb{D}))^ \bot $$ Since z ϑ H2 \( \left( \mathbb{D} \right) \) is an S-invariant subspace of H2\( \left( \mathbb{D} \right) \), then Kzϑ will be an S*-invariant subspace of H2\( \left( \mathbb{D} \right) \), where
Alexandru Aleman, William T. Ross, Nathan S. Feldman   +2 more
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The Backward Shift on Hp

2005
z on the classical Hardy space H. Though there are many aspects of this operator worthy of study [20], we will focus on the description of its invariant subspaces by which we mean the closed linear manifolds E ⊂ H for which BE ⊂ E . When 1 1 case involves heavy use of duality and especially the Hahn-Banach separation theorem where one gets at E by ...
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The unilateral backward shift is w-quasisubscalar

Integral Equations and Operator Theory, 1997
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Forward versus backward shift

Applied Ergonomics, 1991
J. Duchon, J. Wagner, C. Keran
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Backwards Doppler shifts

Nature Photonics, 2011
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