Results 31 to 40 of about 70,449 (343)
Commutators of singular integrals revisited [PDF]
Bulletin of the London Mathematical Society, 2017 We obtain a Bloom‐type characterization of the two‐weighted boundedness of iterated commutators of singular integrals. The necessity is established for a rather wide class of operators, providing a new result even in the unweighted setting for the first ...
A. Lerner, S. Ombrosi, I. Rivera-Ríos
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Making Almost Commuting Matrices Commute [PDF]
Communications in Mathematical Physics, 2009 Suppose two Hermitian matrices $A,B$ almost commute ($\Vert [A,B] \Vert \leq $). Are they close to a commuting pair of Hermitian matrices, $A',B'$, with $\Vert A-A' \Vert,\Vert B-B'\Vert \leq $? A theorem of H. Lin shows that this is uniformly true, in that for every $ >0$ there exists a $ >0$, independent of the size $N$ of the matrices ...
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Fractional operators and their commutators on generalized Orlicz spaces [PDF]
Opuscula Mathematica, 2022 In this paper we examine boundedness of fractional maximal operator. The main focus is on commutators and maximal commutators on generalized Orlicz spaces (also known as Musielak-Orlicz spaces) for fractional maximal functions and Riesz potentials.
Arttu Karppinen
doaj +1 more source
On the Relation Between Quantum Mechanical and Classical Parallel Transport [PDF]
, 1999 We explain how the kind of ``parallel transport'' of a wavefunction used in discussing the Berry or Geometrical phase induces the conventional parallel transport of certain real vectors.
Anandan, Berry, J Anandan, L Stodolsky
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Proceedings of the American Mathematical Society, 1987 Let R R be a principal ideal ring and M k , n {M_{k,n}} the set of k × n k \times n matrices over R R . The following statments are proved: (a) If k ≤ n
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Comment about UV regularization of basic commutators in string theories [PDF]
, 1998 Recently proposed by Hwang, Marnelius and Saltsidis zeta regularization of basic commutators in string theories is generalized to the string models with non-trivial vacuums.
A. Yu. Kamenshchik +13 more
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Commutation matrices and Commutation tensors [PDF]
Linear and Multilinear Algebra, 2018 The commutation matrix was first introduced in statistics as a transposition matrix by Murnaghan in 1938. In this paper, we first investigate the commutation matrix which is employed to transform a matrix into its transpose. We then extend the concept of the commutation matrix to commutation tensor and use the commutation tensor to achieve the ...
Changqing Xu, Lingling He, Zerong Lin
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Commutators of multilinear Calderón-Zygmund operators with kernels of Dini's type and applications
Journal of Mathematical Inequalities, 2019 . Let T be a multilinear Calder´on-Zygmund operator of type ω with ω ( t ) being non- decreasing and satisfying a kind of Dini’s type condition. Let T Π (cid:2) b be the iterated commutators of T with BMO functions. The weighted strong and weak L ( log L
Pu Zhang, ie Sun
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Bulletin of the Australian Mathematical Society, 2006 A ring is called a commutator ring if every element is a sum of additive commutators. In this note we give examples of such rings. In particular, we show that given any ring R, a right R-module N, and a nonempty set Ω, EndR(⌖ΩN) and EndR(ΠΩN) are commutator rings if and only if either Ω is infinite or EndR(N) is itself a commutator ring.
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Commutant lifting for commuting row contractions [PDF]
Bulletin of the London Mathematical Society, 2010 one section and references were ...
Davidson, Kenneth R., Le, Trieu
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