Results 81 to 90 of about 336,860 (179)
Covariant conservation laws, local invariance and Noether’s second theorem
European Physical Journal C: Particles and FieldsWe lay down a set of requirements for a field theory to produce a covariant conservation law out of Noether’s second theorem, and show that neither local invariance implies a covariant conservation law, nor the existence of a covariant conservation law ...
Nuno Barros e Sá +2 more
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A geometric approach to the generalized Noether theorem
, 2021 We provide a geometric extension of the generalized Noether theorem for scaling symmetries recently presented by Zhang P-M et al (2020 Eur. Phys. J. Plus 135 223).
Garcia-Chung A +3 more
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Symbolic computation of variational symmetries in optimal control [PDF]
, 2006 We use a computer algebra system to compute, in an efficient way, optimal control variational symmetries up to a gauge term. The symmetries are then used to obtain families of Noether's first integrals, possibly in the presence of nonconservative ...
André Gomes-dos-Santos +17 more
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Equivariance, Variational Principles, and the Feynman Integral
Symmetry, Integrability and Geometry: Methods and Applications, 2008 We argue that the variational calculus leading to Euler's equations and Noether's theorem can be replaced by equivariance and invariance conditions avoiding the action integral.
George Svetlichny
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Exact solutions of equal-width equation and its conservation laws
Open Physics, 2019 In this work we investigate the equal-width equation, which is used for simulation of (1-D) wave propagation in non-linear medium with dispersion process.
Khalique Chaudry Masood +2 more
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Classical Mechanics and Symplectic Integration [PDF]
, 2005 Content: Classical mechanics: Calculus of variations, Lagrange’s equations, Symmetries and Noether’s theorem, Hamilton’s equations, cannonical transformations, integrable systems, pertubation theory.
Hjorth, Poul G., Nordkvist, Nikolaj
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, 2011 In this paper, we study dual spacelike elastic biharmonic curves with spacelike binormal in dual Lorentzian space D31. We use Noether’s Theorem in our main theorem.
Talat KORPINAR, Essin TURHAN
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Noether\u27s Theorem: Symmetry and Conservation [PDF]
, 2016 A common calculus problem is to find an input that optimizes (maximizes or minimizes) a function. An extension of this problem is to find a function that optimizes an expression depending on the function.
Johnson, Tristan
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Birkhoff's Theorem from a geometric perspective: A simple example [PDF]
Categories and General Algebraic Structures with Applications, 2016 From Hilbert's theorem of zeroes, and from Noether's ideal theory, Birkhoff derived certain algebraic concepts (as explained by Tholen) that have a dual significance in general toposes, similar to their role in the original examples of algebraic ...
F. William Lawvere
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Covariant Canonical Method for Yang-Mills Theory Expressed as a Constrained BF-Like Theory
Advances in Mathematical Physics, 2012 The covariant canonical analysis for Yang-Mills theory expressed as a BF-like action is performed. We study a BF-like action, that in spite of being the coupling of two topological terms, yield, on shell to Yang-Mills action.
Alberto Escalante, Irving García
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