Results 31 to 40 of about 45,294 (190)

Solving multi-point problem for Volterra-Fredholm integro-differential equations using Dzhumabaev parameterization method

Open Mathematics
In this study, a multipoint boundary value problem for Volterra-Fredholm integro-differential equations is considered. The addition of a new function converts the system of Volterra-Fredholm integro-differential equations to a system of Fredholm integro ...
Bakirova Elmira A., Assanova Anar T., Kadirbayeva Zhazira M.   +2 more
doaj   +1 more source

Lower bounds and positivity conditions for Green's functions to second order differential-delay equations

Electronic Journal of Qualitative Theory of Differential Equations, 2009
We consider the Cauchy problem on the positive half-line for the differential-delay equation $$ \ddot u(t)+2c_0(t)\dot u(t)+c_1(t)\dot u(t-h)+d_0(t)u(t)+d_1(t)u(t-h)+d_2(t)u(t-2h)=0 $$ where $c_k(t), d_j(t) (t\geq 0; k=0,1; j=0,1,2)$ are continuous ...
Michael Gil'
doaj   +1 more source

Composition of Fractional Integral and Derivative Operators: Summarised in Tables

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper compiles a complete, detailed list of composition properties for Riemann–Liouville fractional differintegrals, in all possible cases for orders anywhere in the complex plane, with the results presented clearly in a table for easy visual consumption.
Arran Fernandez
wiley   +1 more source

The amazing fractional Maclaurin series for solving different types of fractional mathematical problems that arise in physics and engineering

Partial Differential Equations in Applied Mathematics, 2023
Many applications and natural phenomena in the fields of physics and engineering are described by ordinary and partial differential equations. Therefore, obtaining solutions to these equations helps to analyze and understand the dynamics of these systems,
Marwan Alquran
doaj   +1 more source

Nonlocal Integro-Differential Equations of the Second Order with Degeneration

, 2020
We study the solvability for boundary value problems to some nonlocal second-order integro–differential equations that degenerate by a selected variable. The possibility of degeneration in the equations under consideration means that the statements
Aleksandr I. Kozhanov
core   +1 more source

Providing regular and frequent maps of losses and gains of farmland birds based on European monitoring data

Conservation Biology, EarlyView.
Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando, Guillem Pocull, Sara Fraixedas, Anna Gamero, David Martí, Oriol Solà, Dani Villero, Verena Keller, Petr Voříšek, Alena Klvaňová, Gabriel Gargallo, Vitalie Ajder, Marc Anton, Ainars Aunins, Dawn Balmer, Mattia Brambilla, Tomasz Chodkiewicz, Przemysław Chylarecki, Cristi Domșa, Vlatka Dumbović Mazal, Virginia Escandell, Néstor Fernández, Ruud Foppen, Juan Gallego‐Zamorano, Carlos Godinho, Irene Guerrero, Christina Ieronymidou, Frédéric Jiguet, Aleksi Lehikoinen, Primož Kmecl, Peter Knaus, Lechosław Kuczyński, Åke Lindström, Qenan Maxhuni, Blas Molina, Jean‐Yves Paquet, Maria Luisa Paracchini, Danae Portolou, Draženko Z. Rajković, Dimitrije Radišić, Jiří Reif, Paul Shimmings, Henk Sierdsema, Jovica Sjeničić, Karel Šťastný, Bård G. Stokke, Nicolas Strebel, Zoltán D. Szabó, Tibor Szép, Norbert Teufelbauer, Nicolas Titeux, Sven Trautmann, Judit Veres‐Szászkac, Thomas Vikstrøm, Lluís Brotons   +54 more
wiley   +1 more source

Symbolic Method for Solving Nonlocal Boundary Value Problems for Systems of Ordinary Loaded Integro-Differential Equations

Mathematics
A symbolic method is presented for examining the solvability and constructing the exact solution to boundary value problems for systems of linear ordinary loaded differential equations and loaded integro-differential equations with nonlocal boundary ...
Efthimios Providas, Ioannis N. Parasidis, Jeyhun E. Musayev   +2 more
doaj   +1 more source

The Combined RKM and ADM for Solving Nonlinear Weakly Singular Volterra Integrodifferential Equations

Abstract and Applied Analysis, 2012
The reproducing kernel method (RKM) and the Adomian decomposition method (ADM) are applied to solve nth-order nonlinear weakly singular Volterra integrodifferential equations. The numerical solutions of this class of equations have been a difficult topic
Xueqin Lv, Sixing Shi
doaj   +1 more source

Localized direct boundary–domain integro–differential formulations for scalar nonlinear boundary-value problems with variable coefficients

, 2005
Mixed boundary-value Problems (BVPs) for a second-order quasi-linear elliptic partial differential equation with variable coefficients dependent on the unknown solution and its gradient are considered.
Mikhailov, SE, S. E. Mikhailov
core   +1 more source

Integrating fossil data in ecological niche models to improve predictions of future habitat of Caribbean corals

Conservation Biology, EarlyView.
Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams, Fernando Machado‐Stredel, Rowan C. Martindale, Corinne E. Myers   +3 more
wiley   +1 more source