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排序方式: 共有67条查询结果,搜索用时 22 毫秒
1.
Aequationes mathematicae - For $$p\in (1,\infty )$$ , we establish several criteria of one-sided invertibility on spaces $$l^p=l^p(\mathbb {Z})$$ for discrete band-dominated operators being either... 相似文献
2.
T. B. Karlovich 《Optics and Spectroscopy》2011,111(5):722-726
The effect of the finite temperature of the reservoir on the phase bistability in the fundamental model of quantum optics
is studied based on the Q distribution function calculated numerically and on the P distribution function obtained analytically in the case of large Rabi frequencies. The condition for the appearance of the
phase bistability in a system with allowance for thermal excitations of the reservoir is obtained. 相似文献
3.
Let be an oriented Jordan smooth curve and a diffeomorphism of onto itself which has an arbitrary nonempty set of periodic points. We prove criteria for one-sided invertibility of the binomial functional operator
wherea andb are continuous functions,I is the identity operator,W is the shift operator,Wf=fo, on a reflexive rearrangement-invariant spaceX() with Boyd indices
X
,
X
and Zippin indicesp
x,q
x satisfying inequalities
Partially supported by F.C.T. (Portugal) grant PRAXIS XXI/BPD/22006/99.Partially supported by CONCACYT (México) grant, Cátedra Patrimonial, No. 990017-EX., nivel II. 相似文献
4.
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6.
We establish a Fredholm criterion and an index formula for Toeplitz operators with semi-almost-periodic matrix symbols on the Hardy spaces H
p
(1<p<). Our main result completes the Fredholm theory of the aforementioned operators and generalizes previous results, which concerned the case p=2 or were based on certain additional assumptions, such as factorizability, for the almost-periodic representatives of the symbol. 相似文献
7.
Alexei Yu. Karlovich Yuri I. Karlovich Amarino B. Lebre 《Integral Equations and Operator Theory》2011,70(4):451-483
Suppose α is an orientation preserving diffeomorphism (shift) of
\mathbbR+=(0,¥){{\mathbb{R}}_+=(0,\infty)} onto itself with the only fixed points 0 and ∞. We establish sufficient conditions for the Fredholmness of the singular integral
operator with shift
(aI-bWa)P++(cI-dWa)P-(aI-bW_\alpha)P_++(cI-dW_\alpha)P_- 相似文献
8.
9.
Let VR denote the Banach algebra of absolutely continuous functionsof bounded total variation on R, and let Bp be the Banach algebraof bounded linear operators acting on the Lebesgue space LpRfor 1 < p < . We study the Banach algebra A Bp generatedby the pseudodifferential operators of zero order with slowlyoscillating VR-valued symbols on R. Boundedness and compactnessconditions for pseudodifferential operators with symbols inL R, VR are obtained. A symbol calculus for the non-closed algebraof pseudodifferential operators with slowly oscillating VR-valuedsymbols is constructed on the basis of an appropriate approximationof symbols by infinitely differentiable ones and by use of thetechniques of oscillatory integrals. As a result, the quotientBanach algebra A = A K, where K is the ideal of compact operatorsin Bp, is commutative and involutive. An isomorphism betweenthe quotient Banach algebra A of pseudodifferential operatorsand the Banach algebra of their Fredholm symbols is established. A Fredholm criterionand an index formula for the pseudodifferential operators A A are obtained in terms of their Fredholm symbols. 2000 MathematicsSubject Classification 47G30, 47L15 (primary), 47A53, 47G10(secondary). 相似文献
10.
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