Results 31 to 40 of about 62,542 (292)

Asymptotic theory of the hyperbolic boundary layer in shells of revolution at shock edge loading of the tangential type [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика
The present work is devoted to the construction of asymptotically optimized equations of the hyperbolic boundary layer in thin shells of revolution in the vicinity of the dilation wave front at shock edge loading of the tangential type.
Kirillova, Irina V.
doaj   +1 more source

Gravitational orbits in the expanding Universe revisited

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Modified Newtonian equations for gravitational orbits in the expanding Universe indicate that local gravitationally bounded systems like galaxies and planetary systems are unaffected by the expansion of the Universe.
Václav Vavryčuk
doaj   +1 more source

The computation of Lie point symmetry generators, modulational instability, classification of conserved quantities, and explicit power series solutions of the coupled system

open access: yesResults in Physics, 2023
The well-known Chaffee–Infante reaction hierarchy is examined in this article along with its reaction–diffusion coupling. It has numerous variety of applications in modern sciences, such as electromagnetic wave fields, fluid dynamics, high-energy physics,
Waqas Ali Faridi   +8 more
doaj   +1 more source

A modified Oster-Murray-Harris mechanical model of morphogenesis [PDF]

open access: yes, 2013
There are two main modeling paradigms for biological pattern formation in developmental biology: chemical prepattern models and cell aggregation models. This paper focuses on an example of a cell aggregation model, the mechanical model developed by Oster,
Benjamin L. Vaughan   +6 more
core   +1 more source

Time Dilation Observed in Type Ia Supernova Light Curves and Its Cosmological Consequences

open access: yesGalaxies
The cosmic time dilation observed in Type Ia supernova light curves suggests that the passage of cosmic time varies throughout the evolution of the Universe.
Václav Vavryčuk
doaj   +1 more source

beamWeldFoam: Numerical simulation of high energy density fusion and vapourisation-inducing processes

open access: yesSoftwareX, 2022
High energy density advanced manufacturing processes, such as power beam welding and additive manufacturing, are notoriously difficult to simulate.
Thomas F. Flint   +4 more
doaj   +1 more source

Sequential Monte Carlo with cross-validated neural networks for complexity of hyperbolic black hole solutions in 4D

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
This paper investigates the self-similar solutions of the Einstein-axion-dilaton configuration from type IIB string theory and the global SL(2,R) symmetry.
Armin Hatefi, Ehsan Hatefi
doaj   +1 more source

Classical dilations \`a la Hudson-Parthasarathy of Markov semigroups

open access: yes, 2007
We study the Classical Probability analogue of the dilations of a quantum dynamical semigroup defined in Quantum Probability via quantum stochastic differential equations.
Gregoratti, M.
core   +2 more sources

Computer algebra in gravity: Programs for (non-)Riemannian spacetimes. I [PDF]

open access: yes, 1998
Computer algebra programs are presented for application in general relativity, in electrodynamics, and in gauge theories of gravity. The mathematical formalism used is the calculus of exterior differential forms, the computer algebra system applied Hearn'
Hehl, Friedrich W.   +2 more
core   +2 more sources

Functional Differential Equation with Dilated and Rotated Argument

open access: yesВладикавказский математический журнал, 2021
В статье рассматривается краевая задача в ограниченной плоской области для функционально-дифференциального уравнения второго порядка, содержащего комбинацию растяжений и поворотов старших производных искомой функции. Найдены необходимые и достаточные условия в алгебраической форме выполнения неравенства типа Гординга, обеспечивающего однозначную ...
openaire   +2 more sources

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