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A didatic approach of the Noether's theorem in classical mechanics is derived and used to obtain the laws of conservation.

Classical Physics · Physics 2007-05-23 Rubens de Melo Marinho

We consider Noether symmetries of the equations defined by the sections of characteristic line bundles of nondegenerate 1-forms and of the associated perturbed systems. It appears that this framework can be used for time-dependent systems…

Mathematical Physics · Physics 2019-01-14 Bozidar Jovanovic

Noether's theorem is widely regarded as one of the most elegant results in theoretical physics. The article presents two simple examples that can be used to demonstrate the basic idea behind Noether's theorem, by deriving a relation between…

Classical Physics · Physics 2019-01-18 Markus Pössel

Noether symmetry for higher order gravity theory has been explored, with the introduction of an auxiliary variable which gives the only correct quantum desccription of the theory, as shown in a series of earlier papers. The application of…

Astrophysics · Physics 2008-11-26 A. K. Sanyal , B. Modak , C. Rubano , E. Piedipalumbo

Critiques presented by P. Grassberger in Phys. Rev. Lett. 95, 140601 (2005) are addressed.

Statistical Mechanics · Physics 2007-05-23 Constantino Tsallis

We provide a geometric extension of the generalized Noether theorem for scaling symmetries recently presented in \cite{zhang2020generalized}. Our version of the generalized Noether theorem has several positive features: it is constructed in…

Mathematical Physics · Physics 2020-09-15 Alessandro Bravetti , Angel Garcia-Chung

Noether and Lie symmetry analyses based on point transformations that depend on time and spatial coordinates will be reviewed for a general class of time-dependent Hamiltonian systems. The resulting symmetries are expressed in the form of…

Classical Physics · Physics 2023-04-05 Jürgen Struckmeier , Claus Riedel

A new type of singularity theorem, based on spatial averages of physical quantities, is presented and discussed. Alternatively, the results inform us of when a spacetime can be singularity-free. This theorem provides a decisive…

General Relativity and Quantum Cosmology · Physics 2009-11-13 José M. M. Senovilla

A comment to the paper by S. Chen, H. B\"uttner, and J. Voit, [Phys. Rev. Lett. {\bf 87}, 087205 (2001)].

Strongly Correlated Electrons · Physics 2009-11-07 Luca Capriotti , Federico Becca , Sandro Sorella , Alberto Parola

I shall sketch the contents of Noether's 1918 article, "Invariante Variationsprobleme", in the context of the debate on the conservation of energy that had arisen from Einstein's general theory of relativity. How original was Noether's…

History and Overview · Mathematics 2020-04-21 Yvette Kosmann-Schwarzbach

Noether's theorem and the invariances of the Willmore functional are used to derive conservation laws that are satisfied by the critical points of the Willmore energy subject to generic constraints. We recover in particular previous results…

Differential Geometry · Mathematics 2014-09-25 Yann Bernard

We discuss the relationship between the Noether point symmetries of the geodesic Lagrangian, in a (pseudo)Riemannian manifold, with the elements of the Homothetic algebra of the space. We observe that the classification problem of the…

General Relativity and Quantum Cosmology · Physics 2015-11-25 A. Paliathanasis , K. Krishnakumar , P. G. L. Leach

We reply to David's comment (hep-lat/9504017) on our paper Phys.Rev.Lett. 74(1995)1920.

High Energy Physics - Lattice · Physics 2009-10-28 A. Patrascioiu , E. Seiler

We exploit an ambiguity somewhat hidden in Noether's theorem to derive systematically, for relativistic field theories, the stress-energy tensor's improvement terms that are associated with additional spacetime symmetries beyond…

High Energy Physics - Theory · Physics 2022-12-28 Ioanna Kourkoulou , Alberto Nicolis , Guanhao Sun

The Noether theorem for Hamiltonian constrained systems is revisited. In particular, our review presents a novel method to show that the gauge transformations are generated by the conserved quantities associated with the first class…

High Energy Physics - Theory · Physics 2009-11-11 V. M. Villanueva , J. A. Nieto , L. Ruiz , J. Silvas

We examine the assumptions behind Noether's theorem connecting symmetries and conservation laws. To compare classical and quantum versions of this theorem, we take an algebraic approach. In both classical and quantum mechanics, observables…

Mathematical Physics · Physics 2025-11-04 John C. Baez

We discuss the implications of the time-energy uncertainty relation to recoillessly emitted and captured neutrinos (Mossbauer neutrinos) and show that it does not preclude oscillations of these neutrinos, contrary to a recent claim (J.…

High Energy Physics - Phenomenology · Physics 2009-05-01 Evgeny Kh. Akhmedov , Joachim Kopp , Manfred Lindner

We explicitly derive, following a Noether-like approach, the criteria for preserving Poincare invariance in noncommutative gauge theories. Using these criteria we discuss the various spacetime symmetries in such theories. It is shown that,…

High Energy Physics - Theory · Physics 2007-05-23 Rabin Banerjee , Biswajit Chakraborty , Kuldeep Kumar

We show that the theorem of the three perpendiculars holds in any n-dimensional space form.

Metric Geometry · Mathematics 2013-07-08 Jin-ichi Itoh , Joel Rouyer , Costin Vilcu

We extend Noether's symmetry theorem to fractional action-like variational problems with higher-order derivatives.

Optimization and Control · Mathematics 2007-11-06 Gastao S. F. Frederico , Delfim F. M. Torres