Results 61 to 70 of about 2,407,671 (212)
Modelling the effect of temperature on species coexistence
Journal of Animal Ecology, EarlyView.This study shows that pairwise coexistence is maximized when temperature balances competitive asymmetry, while the effects of warming depend on thermal response shape. By separating structural from model‐dependent predictions, it provides a general framework linking thermal biology, competition and coexistence under climate change. Abstract Temperature
Serguei Saavedra +3 more
wiley +1 more source
Every scientist a modeller? The promise and peril of AI‐assisted mechanistic models
Methods in Ecology and Evolution, EarlyView.Abstract Mechanistic models, expressed as simulations that can be run and visualised, are a powerful way to understand biological and other systems. Building them, however, requires formulating mathematical or rule‐based descriptions and translating them into working code, skills that many ecologists and other disciplinary researchers do not have ...
Alex Sen Gupta
wiley +1 more source
International Journal of Analysis and Applications, 2019 In this paper, we introduce the notion of Menger probabilistic partial metric space and prove some fixed point theorems in the framework of such spaces. Some examples and an application to Volterra type integral equation are given to support the obtained
Amir Ghanenia +3 more
doaj +2 more sources
Solving one pseudo-Volterra integral equation
Қарағанды университетінің хабаршысы. Математика сериясы, 2019 In this paper, we study the solvability of a second - kind pseudo-Volterra integral equation. By replacing the right - hand side and the unknown function, the integral equation is reduced to an integral equation, the kernel of which is not «compressible»
M.T. Kosmakova +4 more
doaj +1 more source
Measure‐valued processes for energy markets
Mathematical Finance, Volume 35, Issue 2, Page 520-566, April 2025.Abstract We introduce a framework that allows to employ (non‐negative) measure‐valued processes for energy market modeling, in particular for electricity and gas futures. Interpreting the process' spatial structure as time to maturity, we show how the Heath–Jarrow–Morton approach can be translated to this framework, thus guaranteeing arbitrage free ...
Christa Cuchiero +3 more
wiley +1 more source
Optimal Portfolio Choice With Cross‐Impact Propagators
Mathematical Finance, EarlyView.ABSTRACT We consider a class of optimal portfolio choice problems in continuous time where the agent's transactions create both transient cross‐impact driven by a matrix‐valued Volterra propagator, as well as temporary price impact. We formulate this problem as the maximization of a revenue‐risk functional, where the agent also exploits available ...
Eduardo Abi Jaber +2 more
wiley +1 more source
The Optimal Mean–Variance Selling Problem With Finite Horizon
Mathematical Finance, EarlyView.ABSTRACT The optimal mean–variance selling problem seeks to determine a dynamically optimal stopping time in the nonlinear problem sup0≤τ≤TE(Xτ)−cVar(Xτ)$\sup _{0 \le \tau \le T} \left[ \mathsf {E}\,\!(X_\tau) - c\, \mathsf {V}ar\,\!(X_\tau) \right]$, where X$X$ is a geometric Brownian motion with strictly positive drift, the supremum is taken over ...
Peter Johnson +2 more
wiley +1 more source
Performing Papal Supremacy: Niccolò Cieco's Capitoli for Martin V and Eugenius IV
Renaissance Studies, EarlyView.ABSTRACT This article analyses two poems performed by the blind oral poet (or canterino) Niccolò Cieco of Arezzo for the first two popes elected after the Great Schism, Martin V and Eugenius IV. It argues that Niccolò's characterisation of the papal office must be understood in relation to both medieval canon law and contemporary ecclesiological ...
Isaac Figliuoli
wiley +1 more source
A study on the convergence and error bound of solutions to 2D mixed Volterra–Fredholm integral and integro-differential equations via high-order collocation method [PDF]
Iranian Journal of Numerical Analysis and OptimizationThe integral equation is transformed into systems of algebraic equations using standard collocation points, and then the algebraic equations are solved using matrix inversion.
A.A. Shalangwa, M.R. Odekunle, S.O. Adee
doaj +1 more source
On multidimensional integral equations of Volterra type [PDF]
Pacific Journal of Mathematics, 1972 http://deepblue.lib.umich.edu/bitstream/2027.42/7837/5/bad2439.0001.001.pdf ; http://deepblue.lib.umich.edu/bitstream/2027.42/7837/4/bad2439.0001.001 ...
openaire +3 more sources