Results 21 to 30 of about 64,085 (304)
Center manifolds for smooth invariant manifolds [PDF]
Transactions of the American Mathematical Society, 2000 We study dynamics of flows generated by smooth vector fields in R
Chow, Shui-Nee, Liu, Weishi, Yi, Yingfei
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Global stability and bifurcation analysis of a delayed predator-prey system with prey immigration
Electronic Journal of Qualitative Theory of Differential Equations, 2016 A delayed predator-prey system with a constant rate immigration is considered. Local and global stability of the equilibria are studied, a fixed point bifurcation appears near the boundary equilibrium and Hopf bifurcation occurs near the positive ...
Gang Zhu, Junjie Wei
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Hopf-zero bifurcation of the ring unidirectionally coupled Toda oscillators with delay
Nonlinear Analysis, 2021 In this paper, the Hopf-zero bifurcation of the ring unidirectionally coupled Toda oscillators with delay was explored. First, the conditions of the occurrence of Hopf-zero bifurcation were obtained by analyzing the distribution of eigenvalues in ...
Rina Su, Chunrui Zhang
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Closed aspherical manifolds with center [PDF]
Journal of Topology, 2013 We show that in all dimensions >7 there are closed aspherical manifolds whose fundamental groups have nontrivial center but do not possess any topological circle actions. This disproves a conjectured converse (proposed by Conner and Raymond) to a classical theorem of Borel.
Cappell, Sylvain +2 more
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Local and global asymptotic behavior of malaria-filariasis coinfections in compliant and noncompliant susceptible pregnant women to antenatal medical program in the tropics [PDF]
E-Journal of Analysis and Applied Mathematics, 2019 In this paper, a mathematical nonlinear model system of equations describing the dynamics of the co-interaction between malaria and filariasis epidemic affecting the susceptible host population of pregnant women in the tropics is formulated.
Oluwatayo M. Ogunmiloro
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Contraction centers in families of hyperkähler manifolds [PDF]
Selecta Mathematica, 2021 We study the exceptional loci of birational (bimeromorphic) contractions of a hyperkähler manifold $M$. Such a contraction locus is the union of all minimal rational curves in a collection of cohomology classes which are orthogonal to a wall of the Kähler cone.
Amerik, Ekaterina, Verbitsky, Misha
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MATHEMATICAL MODEL FOR MICRO-IRRIGATION DESING FOR CENTER PIVOT CORNERS [PDF]
Journal of Soil Sciences and Agricultural Engineering, 2009 A mathematical model was developed to analyzing hydraulic characteristics in a micro-irrigation system design micro-irrigation system for center pivot corners.
A.A. El-Shafei +2 more
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Center Manifolds of Coupled Cell Networks [PDF]
SIAM Journal on Mathematical Analysis, 2017 Dynamical systems with a network structure can display anomalous bifurcations as a generic phenomenon. As an explanation for this it has been noted that homogeneous networks can be realized as quotient networks of so-called fundamental networks. The class of admissible vector fields for these fundamental networks is equal to the class of equivariant ...
Eddie Nijholt +2 more
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Center Manifolds for Delay Equations
Funkcialaj Ekvacioj, 2020 The authors are concerned with the following delay differential equation \[ v^{\prime}=L(t)v_t+g(t,v_t),\tag{E} \] where \(L(t):C([-r,0];\mathbb{R}^n)\to \mathbb{R}^n\), \(t\in \mathbb{R}\), are bounded linear operators (here \(r\) is a positive number) satisfying \(\sup_{t\in \mathbb{R}}\int_t^{t+1}\Vert L(s) \Vert ds < \infty\), and \(g=g(t,v ...
Barreira, Luis, Valls, Claudia
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A Compact Bandpass Filter Manifold With Ultrawide Frequency and Bandwidth Tuning
IEEE Access, 2023 This paper reports a comprehensive design methodology and a compact multilayer integration concept for a fully-reconfigurable bandpass filtering (BPF) manifold with simultaneous ultrawide center frequency and bandwidth (BW) tuning.
Mohammed R. A. Nasser +2 more
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