Results 1 to 10 of about 838,704 (270)
Horizon thermodynamics in fourth-order gravity
Physics Letters B, 2017 In the framework of horizon thermodynamics, the field equations of Einstein gravity and some other second-order gravities can be rewritten as the thermodynamic identity: dE=TdS−PdV.
Meng-Sen Ma
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The fourth-order total variation flow in $ \mathbb{R}^n $
Mathematics in Engineering, 2023 We define rigorously a solution to the fourth-order total variation flow equation in $ \mathbb{R}^n $. If $ n\geq3 $, it can be understood as a gradient flow of the total variation energy in $ D^{-1} $, the dual space of $ D^1_0 $, which is the ...
Yoshikazu Giga +2 more
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New Criteria for Oscillation of Half-Linear Differential Equations with p-Laplacian-like Operators
Mathematics, 2021 In this paper, new oscillatory properties for fourth-order delay differential equations with p-Laplacian-like operators are established, using the Riccati transformation and comparison method.
Omar Bazighifan +4 more
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Correlation properties of interleaved Legendre sequences and Ding-Helleseth-Lam sequences
Electronic Research Archive, 2023 Sequences with optimal autocorrelation properties play an important role in wireless communication, radar and cryptography. Interleaving is a very important method in constructing the optimal autocorrelation sequence.
Yixin Ren , Chenyu Hou, Huaning Liu
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Fourth-order symplectic integration [PDF]
Physica D: Nonlinear Phenomena, 1990 Die Autoren behandeln die Integration der Hamiltonschen Gleichungen unter Anwendung einer expliziten Vierter-Ordnung-Methode. Diese bewahrt die Eigenschaft, daß eine zeitliche Entwicklung eines solchen Systems eine kanonische Transformation aus den Anfangsbedingungen bis zum Endzustand erhält.
Forest, E., Ruth, R.D.
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Kamenev-Type Asymptotic Criterion of Fourth-Order Delay Differential Equation
Fractal and Fractional, 2020 In this paper, we obtain necessary and sufficient conditions for a Kamenev-type oscillation criterion of a fourth order differential equation of the form r 3 t r 2 t r 1 t y ′ t ′ ′ ′ + q t f y &
Omar Bazighifan
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Fourth-order supergravity [PDF]
Nuclear Physics B, 1986 Abstract Starting from a manifestly supersymmetric superfield formalism, we construct the lagrangian of fourth-order supergravity in component field form. The super-Gauss-Bonnet theorem can be used to eliminate one of the three terms in the superfield lagrangian. We verify the super-Gauss- Bonnet theorem explicitly or the bosonic part of the theory.
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Bouncing Cosmology in Fourth-Order Gravity
Universe, 2022 The Big Bang initial singularity problem can be solved by means of bouncing solutions. In the context of extended theories of gravity, we will look for covariant effective actions whose field equations contain up to fourth-order derivatives of the metric
Marcello Miranda +3 more
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Oscillation of Neutral Differential Equations with Damping Terms
Mathematics, 2023 Our interest in this paper is to study and develop oscillation conditions for solutions of a class of neutral differential equations with damping terms. New oscillation criteria were obtained by using Riccati transforms. The criteria we obtained improved
Ioannis Dassios +3 more
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On fourth-order jacobsthal quaternions
Journal of Mathematical Sciences and Modelling, 2018 In this paper, we present for the first time a sequence of quaternions of order 4 that we will call the fourth-order Jacobsthal and the fourth-order Jacobsthal-Lucas quaternions. In particular, we are interested in the generating function, Binet formula,
Gamaliel Cerda-morales
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