Results 81 to 90 of about 252,020 (241)

A dynamically consistent nonstandard finite difference scheme for a predator–prey model

Advances in Difference Equations, 2019
The interaction between prey and predator is one of the most fundamental processes in ecology. Discrete-time models are frequently used for describing the dynamics of predator and prey interaction with non-overlapping generations, such that a new ...
Muhammad Sajjad Shabbir, Qamar Din, Muhammad Safeer, Muhammad Asif Khan, Khalil Ahmad   +4 more
doaj   +1 more source

A generalized model for the population dynamics of a two stage species with recruitment and capture using a nonstandard finite difference scheme

Computational and Applied Mathematics
The aim of this work is to formulate and analyze a new and generalized discrete-time population dynamics model for a two-stage species with recruitment and capture factors. This model is derived from a well-known continuous-time population dynamics model
M. T. Hoang, Jose C. Valverde
semanticscholar   +1 more source

Exact finite-difference scheme and nonstandard finite-difference scheme for coupled Burgers equation [PDF]

Advances in Difference Equations, 2014
Abstract This work develops exact finite-difference schemes for the two-dimensional nonlinear coupled viscous Burgers equation using the analytic solution. We extend the explicit nonstandard finite-difference schemes on the basis of the exact finite-difference schemes to solve the coupled Burgers equation.
Zhang, Lei, Wang, Lisha, Ding, Xiaohua
openaire   +2 more sources

A Non‐Parametric Framework for Correlation Functions on Product Metric Spaces

International Statistical Review, EarlyView.
Summary We propose a non‐parametric framework for analysing data defined over products of metric spaces, a versatile class encountered in various fields. This framework accommodates non‐stationarity and seasonality and is applicable to both local and global domains, such as the Earth's surface, as well as domains evolving over linear time or time ...
Pier Giovanni Bissiri, Bernardo Nipoti, Emilio Porcu, Philip White   +3 more
wiley   +1 more source

A Nonstandard Dynamically Consistent Numerical Scheme Applied to Obesity Dynamics

Journal of Applied Mathematics, 2008
The obesity epidemic is considered a health concern of paramount importance in modern society. In this work, a nonstandard finite difference scheme has been developed with the aim to solve numerically a mathematical model for obesity population dynamics.
Rafael J. Villanueva, Abraham J. Arenas, Gilberto González-Parra   +2 more
doaj   +1 more source

Autoimmunity and Periodontitis

Journal of Periodontal Research, EarlyView.
In a microbe‐driven inflammatory environment, peptidyl‐arginine deiminase (PAD) enzymes from neutrophils and Porphyromonas gingivalis citrullinate both microbial and self‐antigens. B cell presentation of citrullinated or self‐mimicking epitopes activates T cells that assist B cells in antibody isotype switching, affinity maturation, epitope spreading ...
Massimo Costalonga, Vivek Thumbigere‐Math, Mark C. Herzberg   +2 more
wiley   +1 more source

Nonstandard finite difference methods for a convective predator-prey pursuit and evasion model

Journal of difference equations and applications (Print)
One standard and two nonstandard finite difference methods are used to solve a convective predator-prey model consisting of cross-diffusion terms for which no exact solution is known.
A. Appadu, G. N. de Waal, C. Pretorius
semanticscholar   +1 more source

Never, Ever Getting Started: On Prospect Theory Without Commitment

Mathematical Finance, EarlyView.
ABSTRACT Prospect theory is arguably the most prominent alternative to expected utility theory. We study the investment or gambling behavior of a prospect theory decision maker who is aware of his time‐inconsistency but lacks commitment. For the empirically relevant prospect theory specifications, we obtain the extreme prediction that such a decision ...
Sebastian Ebert, Philipp Strack
wiley   +1 more source

Structure and Computation

Noûs, EarlyView.
ABSTRACT It is a truism of mathematics that differences between isomorphic number systems are irrelevant to arithmetic. This truism is deeply rooted in the modern axiomatic method and underlies most strands of arithmetical structuralism, the view that arithmetic is about some abstract number structure.
Balthasar Grabmayr
wiley   +1 more source

Aggregation and the Structure of Value

Noûs, EarlyView.
ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley   +1 more source