Results 111 to 120 of about 3,307,000 (308)

A new upper bound for the growth factor in Gaussian elimination with complete pivoting

open access: yesBulletin of the London Mathematical Society, EarlyView.
Abstract The growth factor in Gaussian elimination measures how large the entries of an LU factorization can be relative to the entries of the original matrix. It is a key parameter in error estimates, and one of the most fundamental topics in numerical analysis. We produce an upper bound of n0.2079lnn+0.91$n^{0.2079 \ln n +0.91}$ for the growth factor
Ankit Bisain, Alan Edelman, John Urschel
wiley   +1 more source

Numerical solutions for Volterra integro-differential forms of Lane-Emden equations of first and second kind using Legendre multi-wavelets

open access: yesElectronic Journal of Differential Equations, 2015
A numerical method based on Legendre multi-wavelets is applied for solving Lane-Emden equations which form Volterra integro-differential equations. The Lane-Emden equations are converted to Volterra integro-differential equations and then are solved ...
Prakash Kumar Sahu, Santanu Saha Ray
doaj  

Solution of the Nonlinear Mixed Volterra-Fredholm Integral Equations by Hybrid of Block-Pulse Functions and Bernoulli Polynomials

open access: yesThe Scientific World Journal, 2014
A new numerical method for solving the nonlinear mixed Volterra-Fredholm integral equations is presented. This method is based upon hybrid functions approximation.
S. Mashayekhi, M. Razzaghi, O. Tripak
doaj   +1 more source

Astrocytes Mediate Psychostimulant‐Induced Alterations of Spike‐Timing Dependent Synaptic Plasticity

open access: yesGlia, Volume 73, Issue 5, Page 1051-1067, May 2025.
Main Points Cocaine and amphetamine stimulates astrocytes and downregulates the GLT‐1. The dysfunction in GLT‐1 modify EPSP kinetics and modulate STDP, switching LTP to LTD in psychostimulant‐treated mice. These effects were restored by upregulation of GLT‐1.
Samuel Alberquilla   +7 more
wiley   +1 more source

Twisted Volterra equation [PDF]

open access: yesJournal of Nonlinear Mathematical Physics, 2005
In this paper an extension of the q-deformed Volterra equation associated with linear rescaling to the general non-linear rescaling is obtained.
openaire   +1 more source

Volterra Integral And Functional Equations

open access: yes, 2016
Thank you for reading volterra integral and functional equations. As you may know, people have look numerous times for their chosen books like this volterra integral and functional equations, but end up in infectious downloads. Rather than reading a good
Matthias Abend
semanticscholar   +1 more source

Integrating food webs in species distribution models can improve ecological niche estimation and predictions

open access: yesEcography, Volume 2025, Issue 5, May 2025.
Biotic interactions play a fundamental role in shaping multitrophic species communities, yet incorporating these interactions into species distribution models (SDMs) remains challenging. With the growing availability of species interaction networks, it is now feasible to integrate these interactions into SDMs for more comprehensive predictions.
Giovanni Poggiato   +3 more
wiley   +1 more source

Exponential Convergence for Numerical Solution of Integral Equations Using Radial Basis Functions

open access: yesJournal of Applied Mathematics, 2014
We solve some different type of Urysohn integral equations by using the radial basis functions. These types include the linear and nonlinear Fredholm, Volterra, and mixed Volterra-Fredholm integral equations.
Zakieh Avazzadeh   +3 more
doaj   +1 more source

Stability Issues for Selected Stochastic Evolutionary Problems: A Review

open access: yesAxioms, 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
doaj   +1 more source

The Maxwell-Volterra reciprocity law in electrodynamics [PDF]

open access: yesarXiv, 2019
Use is made of the theory of elliptic equations with measures data to prove the Maxwell-Volterra reciprocity law. A simple one-dimensional example is also given.
arxiv  

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