Results 31 to 40 of about 165,487 (274)

Variational Principle for Relative Tail Pressure

Entropy, 2017
We introduce the relative tail pressure to establish a variational principle for continuous bundle random dynamical systems. We also show that the relative tail pressure is conserved by the principal extension.
Xianfeng Ma, Ercai Chen
doaj   +1 more source

Variational Estimation Methods for Sturm–Liouville Problems

Mathematics, 2022
In this paper, we are concerned with approach solutions for Sturm–Liouville problems (SLP) using variational problem (VP) formulation of regular SLP.
Elena Corina Cipu, Cosmin Dănuţ Barbu
doaj   +1 more source

Generalized Ekeland’s variational principle with applications

Journal of Inequalities and Applications, 2019
By using the concept of Γ-distance, we prove EVP (Ekeland’s variational principle) on quasi-F-metric (q-F-m) spaces. We apply EVP to get the existence of the solution to EP (equilibrium problem) in complete q-F-m spaces with Γ-distances.
Eshagh Hashemi, Reza Saadati, Choonkil Park   +2 more
doaj   +1 more source

Fermion Systems in Discrete Space-Time

, 2007
Fermion systems in discrete space-time are introduced as a model for physics on the Planck scale. We set up a variational principle which describes a non-local interaction of all fermions. This variational principle is symmetric under permutations of the
Felix Finster, Finster F, Finster F, Finster F, Finster F, Finster F   +5 more
core   +3 more sources

Variational Principle of the Unstable Nonlinear Schrödinger Equation with Fractal Derivatives

Axioms
The well-known nonlinear Schrödinger equation (NLSE) plays a crucial role in describing the temporal evolution of disturbances in marginally stable or unstable media. However, when the media is a fractal form, it becomes ineffective.
Kang-Jia Wang, Ming Li
doaj   +1 more source

Variational Principle in the Algebra of Asymptotic Fields

, 1998
This paper proposes a variational principle for the solutions of quantum field theories in which the ``trial functions'' are chosen from the algebra of asymptotic fields, and illustrates this variational principle in simple cases.Comment: 15 pages, Latex,
A. Raychaudhuri, E. Merzbacher, F. Gross, G. Tiktopoulos, I. E. Tamm, I. I. Kogan, I. I. Kogan, K. Johnson, K. Wilson, M. Bander, M. Bander, M. Creutz, M. E. Peskin, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, O. W. Greenberg, R. Haag, R. P. Feynman, R. P. Feynman, R. P. Feynman, S. M. Dancoff   +27 more
core   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

A Boundary Term for the Gravitational Action with Null Boundaries

, 2016
Constructing a well-posed variational principle is a non-trivial issue in general relativity. For spacelike and timelike boundaries, one knows that the addition of the Gibbons-Hawking-York (GHY) counter-term will make the variational principle well ...
Chakraborty, Sumanta, Majhi, Bibhas Ranjan, Padmanabhan, T., Parattu, Krishnamohan   +3 more
core   +1 more source

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

Subadditive Pre-Image Variational Principle for Bundle Random Dynamical Systems

Mathematics, 2020
A central role in the variational principle of the measure preserving transformations is played by the topological pressure. We introduce subadditive pre-image topological pressure and pre-image measure-theoretic entropy properly for the random bundle ...
Xianfeng Ma, Zhongyue Wang, Hailin Tan
doaj   +1 more source