Results 1 to 10 of about 159,545 (358)
Poisson brackets and commutator brackets. I [PDF]
Proceedings of the American Mathematical Society, 1977 A previous result, that for certain problems in Hamiltonian mechanics the commutator bracket is determined by the Poisson bracket, is here extended to include certain problems in Hamiltonian field theory.
Reese T. Prosser
openalex +3 more sources
Journal of Pharmacy and Bioallied Sciences, 2014 Background and Objectives: The purpose of this study is to evaluate the frictional resistance generated by conventional stainless steel, radiance ceramic bracket, self-ligating and composite brackets using a 0.019 × 0.025 stainless steel straight length ...
Ajith R Pillai +3 more
doaj +2 more sources
Bracketing brackets with bras and kets [PDF]
Journal of Manufacturing Systems, 2021 10 pages, 9 ...
Emily Clark +3 more
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Extended corner symmetry, charge bracket and Einstein’s equations [PDF]
Journal of High Energy Physics, 2021 We develop the covariant phase space formalism allowing for non-vanishing flux, anomalies, and field dependence in the vector field generators. We construct a charge bracket that generalizes the one introduced by Barnich and Troessaert and includes ...
L. Freidel +3 more
semanticscholar +1 more source
Barnich–Troessaert bracket as a Dirac bracket on the covariant phase space [PDF]
Classical and quantum gravity, 2021 The Barnich–Troessaert bracket is a proposal for a modified Poisson bracket on the covariant phase space for general relativity. The new bracket allows us to compute charges, which are otherwise not integrable. Yet there is a catch.
W. Wieland
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A Lie Bracket for the Momentum Kernel [PDF]
Communications in Mathematical Physics, 2020 We prove results for the study of the double copy and tree-level colour/kinematics duality for tree-level scattering amplitudes using the properties of Lie polynomials.
Hadleigh Frost +2 more
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Bracket Failure in Orthodontic Patients: The Incidence and the Influence of Different Factors
BioMed Research International, 2022 Failure of brackets is a common problem in orthodontics. This affects the treatment time, cost, and compliance of the patient. This study was conducted to estimate the bracket failure rate and the related factors for the long term. Methodology.
Haris Khan +4 more
semanticscholar +1 more source
Materials, 2021 The accurate expression of bracket prescription is important for successful orthodontic treatment. The aim of this study was to evaluate the accuracy of digital scan images of brackets produced by four intraoral scanners (IOSs) when scanning the surface ...
S. Shin +4 more
semanticscholar +1 more source
Lightweight design method and application of MEWP bracket based on multi-level optimization
Electronic Research Archive, 2022 Mobile elevating work platform (MEWP) is a large-scale engineering machinery equipment that transports workers and tools to the designated height for operation.
Wen Li +5 more
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On the bracket of integrable derivations [PDF]
Journal of Algebra, 2021 We prove that any multi-variate Hasse-Schmidt derivation can be decomposed in terms of substitution maps and uni-variate Hasse-Schmidt derivations. As a consequence we prove that the bracket of two $m$-integrable derivations is also $m$-integrable, for $m$ a positive integer or infinity.
Luis Narváez Macarro +1 more
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