Results 51 to 60 of about 38,605 (282)
Об одной смешанной задаче для вырождающегося гиперболического уравнения третьего порядка
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2023 В работе исследуется смешанная краевая задача для гиперболического уравнения третьего порядка с вырождением порядка внутри области. В положительной части области рассматриваемое уравнение совпадает с уравнением Аллера, которое является уравнением ...
Макаова, Р.Х.
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A numerical comparison between degenerate parabolic and quasilinear hyperbolic models of cell movements under chemotaxis [PDF]
, 2014 We consider two models which were both designed to describe the movement of eukaryotic cells responding to chemical signals. Besides a common standard parabolic equation for the diffusion of a chemoattractant, like chemokines or growth factors, the two ...
Natalini, Roberto +2 more
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Hidden symmetries of two-field cosmological models
, 2019 We determine the most general time-independent Noether symmetries of two-field cosmological models with rotationally-invariant scalar manifold metrics.
Anguelova, Lilia +2 more
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Models of free quantum field theories on curved backgrounds [PDF]
, 2015 Free quantum field theories on curved backgrounds are discussed via three explicit examples: the real scalar field, the Dirac field and the Proca field.
Benini, Marco, Dappiaggi, Claudio
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An energy analysis of degenerate hyperbolic partial differential equations. [PDF]
Applications of Mathematics, 1984 From author's summary: An energy analysis is carried out for the usual semi-discrete Galerkin method for the semilinear equation in the region \(\Omega\) : \((tu_ t)_ t=\sum_{i,j=1}(a_{ij}(x)u_{x_ i})x_ i- a_ 0(x)u+f(u),\) subject to the initial and boundary conditions, \(u=0\) on \(\partial \Omega\) and \(u(x,0)=u_ 0\).
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Initial-boundary value problems for degenerate hyperbolic equations
Sibirskie Elektronnye Matematicheskie Izvestiya, 2021 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective The Gold Coast criteria permit diagnosis of amyotrophic lateral sclerosis (ALS) even without upper motor neuron (UMN) signs. However, whether ALS patients with UMN signs (ALSwUMN) and those without (ALSwoUMN) share similar characteristics and prognoses remains unclear.
Hee‐Jae Jung +7 more
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Mixed Problems for Singular and Degenerate Hyperbolic Equations
Publications of the Research Institute for Mathematical Sciences, 1987 The author considers a mixed problem for a degenerate hyperbolic equation with principal symbol \(\prod^ m_{j=1}(\tau-t^ k\Lambda_ j(t,x,y;\xi,\eta))\), where \(k\) is a real number, \(k>0\), the variables \((\xi,\eta)\) are dual to \((x,y)\), and the \(\Lambda^ j(t,x,y;\xi,\eta)\) are real and distinct. For this problem the author proves existence and
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A Systematic Comparison of Alpha‐Synuclein Seed Amplification Assays for Increasing Reproducibility
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Seed amplification assays (SAAs) enable ultrasensitive detection of misfolded α‐synuclein across biofluids and tissues. Yet, heterogeneity in protocols limits cross‐study comparability and clinical translation. Here, we review α‐synuclein SAA methods and their performance across various biological matrices.
Manuela Amaral‐do‐Nascimento +3 more
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Analysis and explicit solvability of degenerate tensorial problems
Boundary Value Problems, 2018 We study a two-dimensional boundary value problem described by a tensorial equation in a bounded domain. Once its more general definition is given, we conclude that its analysis is linked to the resolution of an overdetermined hyperbolic problem and ...
Tongxing Li, Giuseppe Viglialoro
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