Concept

Liste de théorèmes du point fixe

Publications associées (181)

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Brane to brane gravity mediation of supersymmetry breaking

Riccardo Rattazzi, Claudio Scrucca

We extend the results of Mirabelli and Peskin to supergravity. We study the compactification on S-1/Z(2) of Zucker's off-shell formulation of 5D supergravity and its coupling to matter at the fixed points. We clarify some issues related to the off-shell de ...

2003

Explicit infiltration equations and the Lambert W-function

David Andrew Barry

The Green and Ampt infiltration formula, as well as the Talsma and Parlange formula, are two-parameter equations that are both expressible in terms of Lambert W- functions. These representations are used to derive explicit, simple and accurate approximatio ...

2002

Min-plus System Theory Applied to Communication Networks

Jean-Yves Le Boudec, Patrick Thiran

Network Calculus is a set of recent developments, which provide a deep insight into flow problems encountered in networking. It can be viewed as the system theory that applies to computer networks. Contrary to traditional system theory, it relies on max-pl ...

2002

Hydrogen related bonding structure in hydrogenated polymorphous and microcrystalline silicon

Raphaël Butté

We investigate the hydrogen related bonding structure in hydrogenated polymorphous silicon films (pm-Si:H) and hydrogenated microcrystalline silicon. Infra-red spectra reveal some new features for both kinds of films. namely new modes appearing in the stre ...

2002

Fixed point analysis of the constant modulus algorithm

Ali H. Sayed

The steady-state performance of adaptive equalizers can significantly vary when they are implemented in finite precision arithmetic, which makes it vital to analyze their performance in a quantized environment. In this paper, we present a fixed-point analy ...

2001

Gomory-chvatal cutting planes and the elementary closure of polyhedra

Friedrich Eisenbrand

The elementary closure P'; of a polyhedrom P is the intersection of P with all its Gomory-Chvátal cutting planes. P'; is a rational polyhedron provided that P is rational. The Chvátal-Gomory procedure is the iterative application of the elementary closure ...

Universität des Saarlandes2000

Anomaly cancellation in K3 orientifolds

Claudio Scrucca

We study in detail the pattern of anomaly cancellation in D = 6 Type IIB Z(N) orientifolds, occurring through a generalized Green-Schwarz mechanism involving several RR antisymmetric tensors and scalars fields. The starting point is a direct string theory ...

2000

Existence for a Stationary Model of Binary Alloy Solidification

Jacques Rappaz

A proof of existence is given for a stationary model of alloy solidification. The system is composed of heat equation, solute equation and Navier-Stokes equations. In rite latter Carman-Kozeny penalization of porous medium models the mushy zone. The proble ...

1995

A recessive mutation, immune deficiency (imd), defines two distinct control pathways in the Drosophila host defense

Bruno Lemaitre

In this paper we report a recessive mutation, immune deficiency (imd), that impairs the inducibility of all genes encoding antibacterial peptides during the immune response of Drosophila. When challenged with bacteria, flies carrying this mutation show a l ...

National Academy of Sciences1995

On a 2-Dimensional Magnetohydrodynamic Problem .1. Modeling and Analysis

Jacques Rappaz

We consider a two-dimensional Magnetohydrodynamic system of equations describing the motion of a conducting fluid in which eddy currents flow. The mathematical model is derived and existence of solutions is proved by using fixed point techniques. Uniquenes ...

1992