Concept

Théorie spectrale des graphes

Publications associées (126)

An Introduction to Bayesian Network Theory and Usage

I present an introduction to some of the concepts within Bayesian networks to help a beginner become familiar with this field's theory. Bayesian networks are a combination of two different mathematical areas: graph theory and probability theory. So, I firs ...

IDIAP2000

Alternative pseudogap scenario: Spectroscopic analogies between underdoped and disordered Bi2Sr2CaCu2O8+x

Giorgio Margaritondo, László Forró, Marco Grioni, Helmuth Berger

Disorder has a strong influence on the spectral properties of the Bi2Sr2CaCu2O8+x high-T-c superconductor, both in the normal and in the superconducting state. High-resolution photoemission reveals a progressive quasiparticle suppression with increasing di ...

2000

Spectral consequences of broken phase coherence in 1T-TaS/sub 2/

Giorgio Margaritondo, László Forró, Helmuth Berger

Random defects destroy long-range phase coherence, and inhibit the metal-insulator transition in the charge density wave (CDW) system IT-TaS/sub 2/. Photoelectron spectroscopy with high resolution reveals corresponding changes in the electronic structure. ...

1998

Spectral consequences of broken phase coherence in 1T-TaS2

Giorgio Margaritondo, László Forró, Marco Grioni, Helmuth Berger

Random defects destroy long-range phase coherence, and inhibit the metal-insulator transition in the charge density wave (CDW) system 1T-TaS2. Photoelectron spectroscopy with high resolution reveals corresponding changes in the electronic structure. Core l ...

1998

Isospectral Riemann surfaces

We construct new examples of compact Riemann surfaces which are non isometric but have the same spectrum of the Laplacian. Examples are given for genus

g=5

and for all

gge 7

. In a second part we give examples of isospectral non isometric surfaces in $b ...

1986

Fast Eigenspace Approximation using Random Signals

Lionel Jérémie Martin, Johann Paratte

We focus in this work on the estimation of the first k eigenvectors of any graph Laplacian using filtering of Gaussian random signals. We prove that we only need k such signals to be able to exactly recover as many of the smallest eigenvectors, regardless ...

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Isospectral Riemann surfaces

We construct new examples of compact Riemann surfaces which are non isometric but have the same spectrum of the Laplacian. Examples are given for genus

g=5

and for all

gge 7

. In a second part we give examples of isospectral non isometric surfaces in $b ...

1986