Results 81 to 90 of about 25,825 (189)
A Commutativity Theorem for Near-Rings [PDF]
Canadian Mathematical Bulletin, 1977 A ring or near-ring R is called periodic if for each xϵR, there exist distinct positive integers n, m for which xn = xm. A well-known theorem of Herstein states that a periodic ring is commutative if its nilpotent elements are central [5], and Ligh [6] has asked whether a similar result holds for distributively-generated (d-g) near-rings.
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A Commutativity theorem for semiprime rings [PDF]
Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics, 1980 AbstractIt is shown that if R is a semiprime ring with 1 satisfying the property that, for each x, y ∈ R, there exists a positive integer n depending on x and y such that (xy)k − xkyk is central for k = n,n+1, n+2, then R is commutative, thus generalizing a result of Kaya.
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Prolongation Projection Commutativity Theorem
Advanced Studies in Pure Mathematics, 2018 If the symbol $g_k$ of a SPDE $R_k$ is 2-acyclic, then the operations of prolongation and projection on $R_k$ commute \[ \rho^{k+l+2}_{k+l+1}((R_k)_{+l+2}) = \left(\rho^{k+l+1}_{k+l}((R_k)_{+l+1})\right)_{+1}.\] We apply this to study contact of three-dimensional CR-manifolds.
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Two theorems in the commutator calculus [PDF]
Transactions of the American Mathematical Society, 1972 Let F = ⟨ a , b ⟩ F = \langle a,b\rangle . Let F n {F_n} be the nth subgroup of the lower central series. Let p be a prime. Let c 3 > c
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A Commutator Theorem and Weighted BMO [PDF]
Transactions of the American Mathematical Society, 1985 The main result of this paper is a commutator theorem: If μ \mu and λ \lambda are A p {A_p} weights, then the commutator H H , M b {M_b} is a bounded operator from
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FIXED POINT THEOREMS FOR COMMUTING MAPPINGS
Demonstratio Mathematica, 1988 The author proves theorems of the following type: Let f and g be two continuous functions on a complete metric space and T, S two multivalued functions on the space CB(X) of nonempty closed and bounded subsets of X. If these functions commute and fullfil some inequality there exist common fixed points.
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A class of loops categorically isomorphic to Bruck loops of odd order
, 2013 We define a new variety of loops we call $\Gamma$-loops. After showing $\Gamma$-loops are power associative, our main goal will be showing a categorical isomorphism between Bruck loops of odd order and $\Gamma$-loops of odd order.
Greer, Mark
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Framed cohomological Hall algebras and cohomological stable envelopes. [PDF]
Lett Math Phys, 2023 Botta TM.
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Comonadic Coalgebras and Bousfield Localization
, 2018 For a model category, we prove that taking the category of coalgebras over a comonad commutes with left Bousfield localization in a suitable sense. Then we prove a general existence result for left-induced model structure on the category of coalgebras ...
White, David, Yau, Donald
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Discrete Quadratic-Phase Fourier Transform: Theory and Convolution Structures. [PDF]
Entropy (Basel), 2022 Srivastava HM +3 more
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