نتایج جستجو برای: basic commutator

تعداد نتایج: 273702  

Journal: :Michigan Mathematical Journal 1966

Journal: :Analysis & PDE 2022

We introduce a commutator method with multipliers to prove averaging lemmas, the regularizing effect for velocity average of solutions kinetic equations. This requires only elementary techniques in Fourier analysis and shows new range assumptions that are sufficient be $L^2([0,T],H^{1/2}_x).$ result not an interesting connection between lemmas local smoothing property dispersive equations, but ...

2006
P Blue A Soffer

In [7], [1], [2], local decay estimates were proven for the (decoupled) Schrödinger, wave, and Regge-Wheeler equations on the Schwarzschild manifold, using commutator methods. Here, we correct a step in the commutator argument. The corrected argument works either for radial semilinear equations or general linear equations. This recovers the results in [7] and [2], but does not recover the non r...

Journal: :J. Symb. Comput. 1998
Mike F. Newman Werner Nickel Alice C. Niemeyer

It is well known, and was first proved by Sylow (1872), that every group of prime-power order p has a presentation of the form {a1, . . . , an | api = vii, 1 ≤ i ≤ n, [ak, aj ] = vjk, 1 ≤ j < k ≤ n}, where vjk is a word in the elements ak+1, . . . , an for 1 ≤ j ≤ k ≤ n . A presentation of this form is now called a power-commutator presentation for the group and written briefly {A | R} . As was...

2012
Peter Oswald Tatiana Shingel

Nonlinear multiscale algorithms often involve nonlinear perturbations of linear coarse-to-fine prediction operators S (also called subdivision operators). In order to control these perturbations, estimates of the “commutator” SF − FS of S with a sufficiently smooth map F are needed. Such estimates in terms of bounds on higher-order differences of the underlying mesh sequences have already appea...

Journal: :Indiana University Mathematics Journal 1966

Journal: :Future Generation Computer Systems 2003

Journal: :Reports on Mathematical Logic 2019

Journal: :International Journal of Algebra and Computation 2022

Several structural properties of an algebraic structure can be seen from the higher commutators its congruences. Even on a finite algebra, sequence commutator operations is infinite object. In this paper, we exhibit representations for algebras congruence modular varieties.

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