Results 71 to 80 of about 110,191 (226)

A note on the application of wazewski’s topological method to an integro: differential equation of volterra type [PDF]

, 2015
The purpose of this note is to generalize the Wazewski’s Topological Method 11, originally stated for ordinary differential equations, to the integro – differential equation of Volterra type (1), under suitable conditions on the functions involved.Fil ...
Guzmán, Paulo Matias, Lugo, Luciano Miguel, Napoles Valdes, Juan Eduardo, Velázquez, José R.   +3 more
core  

Analysis and Solutions for First-Order Multi- Integro- Differential Impulsive Equations

Wasit Journal for Pure sciences
In this paper the existence and uniqueness of first order multi-integro –multi impulsive equation has been presented in details and explained their approach depended on some inequalities and estimations and some special functions as estimators also, all ...
Anfal Shwish Hameed, Sameer Qasim Hassan
semanticscholar   +1 more source

Heat Transfer in n‐Dimensional Parallelepipeds Under Zero Dirichlet Conditions

Engineering Reports, Volume 7, Issue 10, October 2025.
The graphical abstract visually summarizes the analytical study of heat propagation in an n‐dimensional domain: Top Left: Shows a unit cube transformed into a parallelepiped via an affine transformation, representing the geometric generalization of the domain.
Zafar Duman Abbasov, Davron Aslonqulovich Juraev, Obidjon Khayrullaevich Abdullaev, Irfan Nurhidayat, Mohd Asif Shah   +4 more
wiley   +1 more source

On the solution of some simple fractional differential equations

International Journal of Mathematics and Mathematical Sciences, 1990
The differintegration or fractional derivative of complex order ν, is a generalization of the ordinary concept of derivative of order n, from positive integer ν=n to complex values of ν, including also, for ν=−n a negative integer, the ordinary n-th ...
L. M. B. C. Campos
doaj   +1 more source

Attractors for an Energy‐Damped Viscoelastic Plate Equation

Mathematical Methods in the Applied Sciences, Volume 48, Issue 14, Page 13864-13881, 30 September 2025.
ABSTRACT In this paper, we consider a class of non‐autonomous beam/plate equations with an integro‐differential damping given by a possibly degenerate memory and an energy damping given by a nonlocal ε$$ \varepsilon $$‐perturbed coefficient. For each ε>0$$ \varepsilon >0 $$, we show that the dynamical system generated by the weak solutions of the ...
V. Narciso, M. J. D. Nascimento, M. L. Pelicer, I. A. S. Picolli   +3 more
wiley   +1 more source

Inverse Problem for a Mixed Type Integro-Differential Equation with Fractional Order Caputo Operators and Spectral Parameters

Axioms, 2020
The questions of the one-value solvability of an inverse boundary value problem for a mixed type integro-differential equation with Caputo operators of different fractional orders and spectral parameters are considered.
Tursun K. Yuldashev, Erkinjon T. Karimov
doaj   +1 more source

Monitoring population extinction risk with community science data

Journal of Applied Ecology, Volume 62, Issue 9, Page 2133-2147, September 2025.
Our modelling framework provides a robust, computationally efficient and easy‐to‐apply tool for monitoring local persistence probability that can support global conservation efforts. This will complement the monitoring of species population viability in places where standardized monitoring is still lacking, but community science observations are common.
Orlando Acevedo‐Charry, José M. Ponciano, Caroline L. Poli, Brian M. Jeffery, Robert J. Fletcher Jr., María Ángela Echeverry‐Galvis, Bette A. Loiselle, Scott K. Robinson, Miguel A. Acevedo   +8 more
wiley   +1 more source

Statistics of non-linear stochastic dynamical systems under L\'evy noises by a convolution quadrature approach

, 2011
This paper describes a novel numerical approach to find the statistics of the non-stationary response of scalar non-linear systems excited by L\'evy white noises.
Cottone G Di Paola M Marino F, Dybiec B, Gikhman I I, Giulio Cottone, Grigoriu M, Lin Y K, Masud A, Metzler R, Protter Philip E, Risken H, Roberts J B, Samko S G, Sobczyk K, Wedig W V, Young D M   +14 more
core   +1 more source

Wood density variation across an Andes‐to‐Amazon elevational gradient

Journal of Ecology, Volume 113, Issue 9, Page 2370-2385, September 2025.
We study how wood density varies along a 3500‐m elevational gradient, spanning from the Andean tree line to the Amazon basin. Our results reveal that wood density decreases from low to mid‐elevations, then increases toward the tree line. These patterns underscore the influence of species composition, life forms such as tree ferns, and local ...
William Farfan‐Rios, Sassan Saatchi, Imma Oliveras Menor, Yadvinder Malhi, Chelsea M. Robinson, Oliver L. Phillips, Alex Nina‐Quispe, Juan A. Gibaja, Israel Cuba, Karina Garcia‐Cabrera, Norma Salinas, John Terborgh, Nigel Pitman, Rodolfo Vasquez, Abel Monteagudo Mendoza, Percy Nunez Vargas, Craig A. Layman, Miles R. Silman   +17 more
wiley   +1 more source

Distinguishing passive and driven trait evolution in the presence of boundaries

Methods in Ecology and Evolution, Volume 16, Issue 9, Page 2067-2081, September 2025.
Abstract Quantifying the dynamics of macroevolutionary trends, such as changes in body size and complexity, is vital for understanding the processes that have shaped patterns of extant and extinct biodiversity. For example, whilst maximum body size may tend to increase within lineages (the Cope‐Depéret rule), it is still unclear whether such patterns ...
Elliot M. Butterworth, Tim Rogers, Matthew A. Wills   +2 more
wiley   +1 more source