Results 1 to 10 of about 8,379 (259)
Acoustic-Based Fault Diagnosis of Commutator Motor
Electronics (Switzerland), 2018 In the paper, the author presents acoustic-based fault diagnosis of a commutator motor (CM). Five states of the commutator motor were considered: healthy commutator motor, commutator motor with broken rotor coil, commutator motor with shorted stator ...
Adam Glowacz, Glowacz Adam
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On the commutator of the Marcinkiewicz integral
Journal of Mathematical Analysis and Applications, 2003 Lp(Rn) boundedness is considered for the commutator of higher-dimensional Marcinkiewicz integral. Some conditions implying the L2(Rn) and the Lp(Rn) boundedness for the commutator of the Marcinkiewicz integral are ...
Dunyan Yan
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Some of the next articles are maybe not open access.
Canadian Journal of Mathematics, 1960
Let A, B, and X be n-square matrices over an algebraically closed field F of characteristic 0. Let [A, B] = AB — BA and set (A, B) = [A, [A, B]]. Recently several proofs (1; 3; 5) of the following result have appeared: if det (AB) ≠ 0 and (A,B) = 0 then A-1B-1AB - I is nilpotent.
Marcus, Marvin, Khan, Nisar A.
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Let A, B, and X be n-square matrices over an algebraically closed field F of characteristic 0. Let [A, B] = AB — BA and set (A, B) = [A, [A, B]]. Recently several proofs (1; 3; 5) of the following result have appeared: if det (AB) ≠ 0 and (A,B) = 0 then A-1B-1AB - I is nilpotent.
Marcus, Marvin, Khan, Nisar A.
openaire +2 more sources
Canadian Journal of Mathematics, 1963
The following elementary facts about certain commutative diagrams, called "squares," are stated and proved in terms of abelian groups and their homomorphisms. However, they are valid for arbitrary abelian categories and can be proved also for them. This does not need to be shown, since every abelian category can be embedded into the category of abelian
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The following elementary facts about certain commutative diagrams, called "squares," are stated and proved in terms of abelian groups and their homomorphisms. However, they are valid for arbitrary abelian categories and can be proved also for them. This does not need to be shown, since every abelian category can be embedded into the category of abelian
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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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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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18th Annual Symposium on Foundations of Computer Science (sfcs 1977), 1977
In this paper we show that the computation of the determinant requires an exponential number of multiplications if the commutativity of indeterminates is not allowed. The determinant can be computed in polynomial time with the commutation of indeterminates.
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In this paper we show that the computation of the determinant requires an exponential number of multiplications if the commutativity of indeterminates is not allowed. The determinant can be computed in polynomial time with the commutation of indeterminates.
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Commutativity, non-commutativity, and bilinearity
Information Processing Letters, 1976openaire +2 more sources
Sharp commutator estimates via harmonic extensions
Nonlinear Analysis: Theory, Methods & Applications, 2020Armin Schikorra
exaly