Title
Discrete-time and continuous-time modelling: some bridges and gaps
Abstract
The relationship between continuous-time dynamics and the corresponding discrete schemes, and its generally limited validity, is an important and widely acknowledged field within numerical analysis. In this paper, we propose another, more physical, viewpoint on this topic in order to understand the possible failure of discretisation procedures and the way to fix it. Three basic examples, the logistic equation, the Lotka–Volterra predator–prey model and Newton's law for planetary motion, are worked out. They illustrate the deep difference between continuous-time evolutions and discrete-time mappings, hence shedding some light on the more general duality between continuous descriptions of natural phenomena and discrete numerical computations.
Year
DOI
Venue
2007
10.1017/S0960129507005981
Mathematical Structures in Computer Science
Keywords
DocType
Volume
volterra predator,continuous-time evolution,basic example,discrete numerical computation,continuous description,continuous-time dynamic,continuous-time modelling,numerical analysis,corresponding discrete scheme,discrete-time mapping,deep difference
Journal
17
Issue
ISSN
Citations 
2
0960-1295
1
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Hubert Krivine110.34
Annick Lesne2417.12
jacques r treiner310.34