Results 1 to 10 of about 165 (119)
Analytical expressions for the time evolution of spin systems affected by two or more interactions [PDF]
Magnetic ResonanceAnalytical expressions for the description of the time evolution of spin systems beyond product–operator formalism (POF) can be obtained if a low-dimensional subspace of the Liouville space has been found in which the time evolution of the spin system ...
G. Hempel
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Multiple commutator formulas [PDF]
Israel Journal of Mathematics, 2012 Let A be a quasi-finite R-algebra (i.e., a direct limit of module finite algebras) with identity. Let I_i, i=0,...,m, be two-sided ideals of A, \GL_n(A,I_i) the principal congruence subgroup of level I_i in GL_n(A) and E_n(A,I_i) be the relative elementary subgroup of level I_i.
Hazrat, Roozbeh (R16959), Zhang, Zuhong
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A Decomposition Formula for the Weighted Commutator [PDF]
Applied Categorical Structures, 2013 We decompose the weighted subobject commutator of M. Gran, G. Janelidze and A. Ursini as a join of a binary and a ternary commutator.
Nelson Martins-Ferreira +1 more
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Commuting extensions and cubature formulae [PDF]
Numerische Mathematik, 2005 34 pages, 3 figures ...
Ilan Degani +2 more
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Product formulas for exponentials of commutators [PDF]
Journal of Mathematical Physics, 2013 We provide a recursive method for systematically constructing product formula approximations to exponentials of commutators, giving approximations that are accurate to arbitrarily high order. Using these formulas, we show how to approximate unitary exponentials of (possibly nested) commutators using exponentials of the elementary operators, and we ...
Childs, Andrew M., Wiebe, Nathan
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An Asymptotic Formula for the Commutators
Journal of Functional Analysis, 1998 The main aim of this paper is to prove two asymptotic formulas which unify several ``Taylor type formulas'', defined in the context of commutators and analytic functional calculi. For the sake of simplicity, we shall present only the particular case of bounded linear operators acting in the same Banach space, although the authors' framework is slightly
Beltita, Daniel, Sabac, Mihai
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Approximate double commutants and distance formulas [PDF]
Operators and Matrices, 2014 We extend work of the first author concering relative double commutants and approximate double commutants of unital subalgebras of unital C*-algebras, including metric versions involving distance estimates. We prove metric results for AH subalgebras of von Neumann algebras or AF subalgebras of primitive C*-algebras.
Hadwin, Don, Shen, Junhao
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Multiple commutator formulas for unitary groups [PDF]
Israel Journal of Mathematics, 2017 Let $(\FormR)$ be a form ring such that $A$ is quasi-finite $R$-algebra (i.e., a direct limit of module finite algebras) with identity. We consider the hyperbolic Bak's unitary groups $\GU(2n,\FormR)$, $n\ge 3$. For a form ideal $(I,Γ)$ of the form ring $(\FormR)$ we denote by $\EU(2n,I,Γ)$ and $\GU(2n,I,Γ)$ the relative elementary group and the ...
Hazrat, Roozbeh (R16959) +2 more
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A multiple commutator formula for the sum of Feynman diagrams [PDF]
Nuclear Physics B, 1997 uu-encoded latex file with two postscript ...
Lam, C. S., Liu, K. F.
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Derivation of Commutative Rings and the Leibniz Formula for Power of Derivation [PDF]
Formalized Mathematics, 2021 Summary In this article we formalize in Mizar [1], [2] a derivation of commutative rings, its definition and some properties. The details are to be referred to [5], [7]. A derivation of a ring, say D , is defined generally as a map from a commutative ring
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