Results 251 to 260 of about 10,469 (263)

Comparative analysis of brushless DC and switched reluctance motors for optimizing off-grid water pumping. [PDF]

open access: yesSci Rep
Kumar A   +7 more
europepmc   +1 more source

Commutativity and Homotopy-Commutativity [PDF]

open access: possible, 1964
The aim of this section is to show, by means of the methods developed in Chapter 3, that for an associative H-space G there exist maps G× G → G satisfying certain commutativity conditions (Theorem 4.5). As will be explained in Remarks 4.6 this result is related to the work of other authors on homotopy-commutativity.
M. Arkowitz, C. R. Curjel
openaire   +1 more source

Commutators and the Commutator Subgroup

The American Mathematical Monthly, 1977
(1977). Commutators and the Commutator Subgroup. The American Mathematical Monthly: Vol. 84, No. 9, pp. 720-722.
openaire   +2 more sources

Commutators of operators

American Journal of Mathematics, 1952
A mathematical formulation of the famous Heisenberg uncertainty principle is that a certain pair of linear transformations P and Q satisfies, after suitable normalizations, the equation PQ - QP = 1. It is easy enough to produce a concrete example of this behavior; consider L2(-∞, +∞) and let P and Q be the differentiation transformation and the ...
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Commutativity of rings with constraints on commutators

Results in Mathematics, 1985
Let F denote a commutative ring, \(F\) the corresponding ring of polynomials in two non-commuting indeterminates, and F[X,Y] the ring of polynomials in two commuting indeterminates. A polynomial \(f(X,Y)\in F\) is called admissible if each of its monomials has length at least 3 and f(X,Y) has trivial image under the natural F-algebra map from \(F\) to ...
openaire   +2 more sources

Commuting in Happyville

2016
This paper presents a spatial model of tax competition in an asymmetric duocentric city in which pollution from commuting is accounted for. Residential location being fixed, agents can chose their workplace and face a tradeo ff between wage and commuting costs - including traffi c-related pollution costs. We contrast the first best solution of a unique
openaire   +4 more sources

Commutativity of rings with constraints on commutators

2012
This paper studies commutativity of rings \(R\) satisfying polynomial identities of the form\break \(x^t[x^n,y]y^r=[x,y^m]y^s\) and three similar forms, where \(n,m,r,s,t\) are suitably-chosen nonnegative integers. Whether the theorems are correct as stated is not clear, but for some \((n,m,r,s,t)\) the proofs given do not work.
openaire   +2 more sources

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