Results 71 to 80 of about 9,998 (155)

Rolf Sundberg's contribution to the Discussion of “On optimal linear prediction” by I. Helland

Scandinavian Journal of Statistics, Volume 53, Issue 1, Page 9-10, March 2026.
Rolf Sundberg
wiley   +1 more source

Local–global principles for semi‐integral points on Markoff orbifold pairs

Journal of the London Mathematical Society, Volume 112, Issue 6, December 2025.
Abstract We study local–global principles for semi‐integral points on orbifold pairs of Markoff type. In particular, we analyse when these orbifold pairs satisfy weak weak approximation, weak approximation and strong approximation off a finite set of places.
Vladimir Mitankin, Justin Uhlemann
wiley   +1 more source

Non-local conserved currents and continuous non-invertible symmetries

Journal of High Energy Physics
We embark on a systematic study of continuous non-invertible symmetries, focusing on 1+1d CFTs. We describe a generalized version of Noether’s theorem, where continuous non-invertible symmetries are associated to non-local conserved currents: point-like ...
Diego Delmastro, Adar Sharon, Yunqin Zheng   +2 more
doaj   +1 more source

Fractional Time-Scales Noether’s Theorem for Non-Standard Birkhoffian System

Fractal and Fractional
In this work, Noether symmetries and conserved quantities of a non-standard Birkhoffian system based on the Caputo Δ Pfaff–Birkhoff principle on time scales are studied.
Zhenyu Wu, Chuanjing Song
doaj   +1 more source

On the conservation of energy: Noether's theorem revisited

Heliyon
This paper studies the dynamics and conservation of energy. It evaluates the validity of Noether's theorem as a formal argument supporting the law of conservation of energy in physical systems.
Jean-Paul Chavas
doaj   +1 more source

Covariant conservation laws, local invariance and Noether’s second theorem

European Physical Journal C: Particles and Fields
We 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, Miguel A. S. Pinto, Tomás Trindade   +2 more
doaj   +1 more source

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, Plaatjie Karabo, Simbanefayi Innocent   +2 more
doaj   +1 more source

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
doaj  

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
doaj  

Noether’s theorem and Ward-Takahashi identities from homotopy algebras

Journal of High Energy Physics
We derive the new identity in homotopy algebras which directly corresponds to the Schwinger-Dyson equations in quantum field theory. As an application, we derive the Ward-Takahashi identities.
Keisuke Konosu, Jojiro Totsuka-Yoshinaka
doaj   +1 more source