scholarly journals Quantitative towers in finite difference calculus approximating the continuum

Author(s):  
R Lawrence ◽  
N Ranade ◽  
D Sullivan

Abstract Multivector fields and differential forms at the continuum level have respectively two commutative associative products, a third composition product between them and various operators like $\partial$, d and ‘*’ which are used to describe many nonlinear problems. The point of this paper is to construct consistent direct and inverse systems of finite dimensional approximations to these structures and to calculate combinatorially how these finite dimensional models differ from their continuum idealizations. In a Euclidean background, there is an explicit answer which is natural statistically.

2000 ◽  
Author(s):  
Mehrdad Massoudi ◽  
Tran X. Phuoc

Abstract In this paper we study the flow of granular materials between two horisontal flat plates where the top plate is moving with a constant speed. The constitutive relation used for the stress is based on the continuum model proposed by Rajagopal and Massoudi (1990), where the material parameters are derived using the kinetic theory model proposed by Boyle and Massoudi (1990). The governing equations are non-dimensionalized and the resulting system of non-linear differential equations is solved numerically using finite difference technique.


2010 ◽  
Vol 50 (5) ◽  
pp. 816-830 ◽  
Author(s):  
S. D. Glyzin ◽  
A. Yu. Kolesov ◽  
N. Kh. Rozov

1997 ◽  
Vol 229 (5) ◽  
pp. 299-305 ◽  
Author(s):  
R.I. McLachlan ◽  
I. Szunyogh ◽  
V. Zeitlin

2001 ◽  
Vol 63 (10) ◽  
Author(s):  
M. Ambrus ◽  
P. Hájíček

1998 ◽  
Vol 10 (04) ◽  
pp. 439-466 ◽  
Author(s):  
Elisa Ercolessi ◽  
Giovanni Landi ◽  
Paulo Teotonio-Sobrinho

Recently a new kind of approximation to continuum topological spaces has been introduced, the approximating spaces being partially ordered sets (posets) with a finite or at most a countable number of points. The partial order endows a poset with a nontrivial non-Hausdorff topology. Their ability to reproduce important topological information of the continuum has been the main motivation for their use in quantum physics. Posets are truly noncommutative spaces, or noncommutative lattices, since they can be realized as structure spaces of noncommutative C*-algebras. These noncommutative algebras play the same rôle as the algebra of continuous functions [Formula: see text] on a Hausdorff topological space M and can be thought of as algebras of operator valued functions on posets. In this article, we will review some mathematical results that establish a duality between finite posets and a certain class of C*-algebras. We will see that the algebras in question are all postliminal approximately finite dimensional (AF) algebras.


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