Results 1 to 10 of about 2,502,460 (317)
Normal form for a Pfaffian [PDF]
Pacific Journal of Mathematics, 1964 Richard Arens
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Stability and bifurcation analysis of SIQR for the COVID-19 epidemic model with time delay
Mathematical Biosciences and Engineering, 2021 Based on the SIQR model, we consider the influence of time delay from infection to isolation and present a delayed differential equation (DDE) according to the characteristics of the COVID-19 epidemic phenomenon.
Shishi Wang +3 more
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Mathematical Biosciences and Engineering, 2023 Since the outbreak of COVID-19, there has been widespread concern in the community, especially on the recent heated debate about when to get the booster vaccination.
Zimeng Lv, Xinyu Liu , Yuting Ding
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Dynamic Analysis of a COVID-19 Vaccination Model with a Positive Feedback Mechanism and Time-Delay
Mathematics, 2022 As the novel coronavirus pandemic has spread globally since 2019, most countries in the world are conducting vaccination campaigns. First, based on the traditional SIR infectious disease model, we introduce a positive feedback mechanism associated with ...
Xin Ai, Xinyu Liu, Yuting Ding, Han Li
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Dynamical Behaviors of an SIR Epidemic Model with Discrete Time
Fractal and Fractional, 2022 Analytically and numerically, the study examines the stability and local bifurcations of a discrete-time SIR epidemic model. For this model, a number of bifurcations are studied, including the transcritical, flip bifurcations, Neimark–Sacker bifurcations,
Bo Li +2 more
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On the Normal Form of the Kirchhoff Equation [PDF]
Journal of Dynamics and Differential Equations, 2020 AbstractConsider the Kirchhoff equation $$\begin{aligned} \partial _{tt} u - \Delta u \Big ( 1 + \int _{\mathbb {T}^d} |\nabla u|^2 \Big ) = 0 \end{aligned}$$ ∂
BALDI, Pietro, HAUS, Emanuele
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Normal form of formulas of pure hybrid logic
Lietuvos Matematikos Rinkinys, 2021 In this paper,we study a transformationof pure hybrid logic formulae,which do not have binding operator, into an equivalent normal form, which does not have any satisfiability operators in the scope of another satisfiability operator.
Daiva Aleknavičiūtė +1 more
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Dynamics and Bifurcations of a Discrete-Time Moran-Ricker Model with a Time Delay
Mathematics, 2023 This study investigates the dynamics of limited homogeneous populations based on the Moran-Ricker model with time delay. The delay in density dependence caused the preceding generation to consume fewer resources, leading to a decrease in the required ...
Bo Li, Zimeng Yuan, Zohreh Eskandari
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Normal forms for real quadratic forms [PDF]
Archiv der Mathematik, 2009 We investigate the non-diagonal normal forms of a quadratic form on R^n, in particular for n=3. For this case it is shown that the set of normal forms is the closure of a 5-dimensional submanifold in the 6-dimensional Grassmannian of 2-dimensional subspaces of \R^5.
Schlichtkrull, Henrik, Krötz, Bernhard
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Normal Form and Solitons [PDF]
, 2008 32 pages, AMSLaTeX, 8 ...
Yuji Kodama, Yasuaki Hiraoka
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