Results 11 to 20 of about 39,509 (252)

An Overview of the Hamilton–Jacobi Theory: the Classical and Geometrical Approaches and Some Extensions and Applications

open access: yesMathematics, 2021
This work is devoted to review the modern geometric description of the Lagrangian and Hamiltonian formalisms of the Hamilton–Jacobi theory. The relation with the “classical” Hamiltonian approach using canonical transformations is also analyzed ...
Narciso Román-Roy
doaj   +1 more source

The modal sensitivity, robustness and roughness of dynamic systems (review article) [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2021
The review focuses on the development of theories of sensitivity and modal sensitivity, robustness and roughness of dynamic systems. In modern theory of dynamic systems and automatic control systems, there is a need to study the properties of sensitivity,
Roman O. Omorov
doaj   +1 more source

Dimension reduction of dynamical systems on networks with leading and non-leading eigenvectors of adjacency matrices

open access: yesPhysical Review Research, 2022
Dimension reduction techniques for dynamical systems on networks are considered to promote our understanding of the original high-dimensional dynamics.
Naoki Masuda, Prosenjit Kundu
doaj   +1 more source

Dark Type Dynamical Systems: The Integrability Algorithm and Applications

open access: yesAlgorithms, 2022
Based on a devised gradient-holonomic integrability testing algorithm, we analyze a class of dark type nonlinear dynamical systems on spatially one-dimensional functional manifolds possessing hidden symmetry properties and allowing their linearization on
Yarema A. Prykarpatsky   +3 more
doaj   +1 more source

Time-averaging axion-like interacting scalar fields models

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
In this paper, we study a cosmological model inspired in the axionic matter with two canonical scalar fields $$\phi _1$$ ϕ 1 and $$\phi _2$$ ϕ 2 interacting through a term added to its potential. Introducing novel dynamical variables, and a dimensionless
Saikat Chakraborty   +3 more
doaj   +1 more source

Double field theory at SL(2) angles

open access: yesJournal of High Energy Physics, 2017
An extended field theory is presented that captures the full SL(2) × O(6, 6 + n) duality group of four-dimensional half-maximal supergravities. The theory has section constraints whose two inequivalent solutions correspond to minimal D = 10 supergravity ...
Franz Ciceri   +4 more
doaj   +1 more source

EXTENDED DYNAMICAL SYSTEMS AND STABILITY THEORY [PDF]

open access: yesProceedings of the National Academy of Sciences, 1967
Extended dynamical systems in Banach space and use of invariance principle for stability theory of partial differential ...
Hale, J. K., Infante, E. F.
openaire   +2 more sources

Category Theory for Autonomous and Networked Dynamical Systems

open access: yesEntropy, 2019
In this discussion paper we argue that category theory may play a useful role in formulating, and perhaps proving, results in ergodic theory, topogical dynamics and open systems theory (control theory). As examples, we show how to characterize Kolmogorov&
Jean-Charles Delvenne
doaj   +1 more source

Theory of the Loschmidt echo and dynamical quantum phase transitions in disordered Fermi systems

open access: yesPhysical Review Research, 2023
In this work we develop the theory of the Loschmidt echo and dynamical phase transitions in noninteracting strongly disordered Fermi systems after a quench.
Tuomas I. Vanhala, Teemu Ojanen
doaj   +1 more source

Spectral Theory of Dynamical Systems

open access: yes, 2020
This is a survey on spectral theory of dynamical systems.
Kanigowski, Adam, Lemańczyk, Mariusz
openaire   +2 more sources

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