Results 61 to 70 of about 26,735 (243)
, 2012 We solve the cosmological evolution of warm dark matter (WDM) density fluctuations with the Volterra integral equations of paper I. In the absence of neutrinos, the anisotropic stress vanishes and the Volterra equations reduce to a single integral ...
E. W. Kolb +5 more
core +3 more sources
On Stieltjes-Volterra integral equations [PDF]
Bulletin of the Australian Mathematical Society, 1978 A Stieltjes-Volterra integral equation systemis firstly considered. Pointwise estimates and boundedness of its solutions are obtained under various conditions on the functionK. To do this, the well-known Gronwall-Bellman integral inequality is generalized.
openaire +2 more sources
Friends or foes? Polyploidy and competition in a grassland geophyte
Oikos, EarlyView.Previous studies have suggested polyploids may possess a competitive advantage over diploids, due to their larger size, increased vigour or ability to better respond to abiotic stress. However, few studies have tested the effect of polyploidy on competitive ability directly, and only relatively recently has this oversight begun to be addressed. Here we
Damian Vaz de Sousa +3 more
wiley +1 more source
A third-order numerical method for solving fractional ordinary differential equations
AIMS MathematicsIn this paper, we developed a novel numerical method for solving general nonlinear fractional ordinary differential equations (FODEs). First, we transformed the nonlinear FODEs into the equivalent Volterra integral equations.
Xiaopeng Yi +4 more
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Convergence analysis of product integration method for nonlinear weakly singular Volterra-Fredholm integral equations [PDF]
Sahand Communications in Mathematical Analysis, 2015 In this paper, we studied the numerical solution of nonlinear weakly singular Volterra-Fredholm integral equations by using the product integration method. Also, we shall study the convergence behavior of a fully discrete version of a product integration
Parviz Darania, Jafar Ahmadi Shali
doaj
Concerning periodic solutions to non-linear discrete Volterra equations with finite memory [PDF]
, 2007 In this paper we discuss the existence of periodic solutions of discrete (and discretized) non-linear Volterra equations with finite memory. The literature contains a number of results on periodic solutions of non linear Volterra integral equations with ...
Baker, Christopher T. H., Song, Yihong
core
A UAV Air Combat Trajectory Prediction Method Based on QCNet
CAAI Transactions on Intelligence Technology, EarlyView.ABSTRACT The Unmanned Aerial Vehicle (UAV) air combat trajectory prediction algorithm facilitates strategic pre‐planning by predicting UAV flight trajectories with high accuracy, thus mitigating risks and securing advantages in intricate aerial scenarios.
Zhang Jiahui, Meng Zhijun, He Jiazheng
wiley +1 more source
Stability Issues for Selected Stochastic Evolutionary Problems: A Review
Axioms, 2018 We review some recent contributions of the authors regarding the numerical approximation of stochastic problems, mostly based on stochastic differential equations modeling random damped oscillators and stochastic Volterra integral equations.
Angelamaria Cardone +3 more
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A Singular Nonlinear Volterra Integral Equation [PDF]
Journal of Integral Equations and Applications, 1993 Many problems in Applied Mathematics lead to the study of the nonlinear partial differential equation \(u_ t = (a(u))_{xx} + (b(u))_ x + c(u)\). The interest in the existence of travelling-wave solutions of the form \(U(x,t) = U(\psi)\), \(\psi = x - \lambda t\), originates an ordinary differential equation from which arise integral equations of the ...
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Ecological graph theory: Simulating competition and coexistence on graphs
Methods in Ecology and Evolution, EarlyView.Abstract Since its inception, the evolutionary graph theory (EGT) has been extensively used to study the fixation probability, the rate of evolution, game‐theoretical topics and related questions in a spatially structured framework. However, few attempts have been made to use this framework in ecology.
Ata Kalirad, Ralf J. Sommer
wiley +1 more source