Zobrazeno 1 - 10
of 181
pro vyhledávání: '"théorie spectrale"'
Autor:
Pineault, Mathieu
Ce mémoire porte sur l’étude du laplacien sur des surfaces de Riemann. En particulier, nous nous intéressons à ses valeurs propres qui représentent les notes que jouerait la surface si elle était un tambour. Les valeurs les plus étudiées so
Externí odkaz:
http://hdl.handle.net/1866/40302
Autor:
Castillon, Philippe
Publikováno v:
Proceedings of the American Mathematical Society, 2002 Apr 01. 130(4), 1153-1163.
Externí odkaz:
https://www.jstor.org/stable/2699564
Autor:
Stephan, Ludovic
Publikováno v:
General Mathematics [math.GM]. Sorbonne Université, 2021. English. ⟨NNT : 2021SORUS497⟩
This manuscript deals with inference problems on large, usually sparse, random graphs. We first focus on a planted tree problem, where a tree with known shape is planted inside a sparse Erdös-Rényi graph. When this tree is a path, we provide a comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______165::9e9831762717247fba41d320bbf74525
https://theses.hal.science/tel-03720004/file/STEPHAN_Ludovic_2021.pdf
https://theses.hal.science/tel-03720004/file/STEPHAN_Ludovic_2021.pdf
Autor:
Léo Morin
Publikováno v:
Equations aux dérivées partielles [math.AP]. Université Rennes 1, 2021. Français. ⟨NNT : 2021REN1S036⟩
HAL
HAL
The magnetic Laplacian is a Schrödinger operator with magnetic field. The aim of this thesis is to study its spectrum in the semiclassical limit. We focus on non-vanishing magnetic fields. As one can see using microlocal and semiclassical analysis,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::42bc32db00167a02457d11463cada076
https://theses.hal.science/tel-03420352/file/MORIN_Leo.pdf
https://theses.hal.science/tel-03420352/file/MORIN_Leo.pdf
Publikováno v:
SFdS-52 Journées de Statistique de la Société Francaise de Statistique
SFdS-52 Journées de Statistique de la Société Francaise de Statistique, Jun 2021, Nice, France. pp.1-6
SFdS-52 Journées de Statistique de la Société Francaise de Statistique, Jun 2021, Nice, France. pp.1-6
National audience; We study the problem of inferring the conditional independence structure between the entries of a Gaussian random vector. Our focus is on finding groups of independent variables. This can be translated into the estimation of a prec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::f2a79784453ed547edc692a9f146c9b1
https://hal.inria.fr/hal-03275245/document
https://hal.inria.fr/hal-03275245/document
Autor:
Ftouhi, Ilias
Publikováno v:
Optimization and Control [math.OC]. Sorbonne Université, 2021. English. ⟨NNT : 2021SORUS008⟩
The present thesis is a contribution to the field of calculus of variations and more precisely the discipline of shape optimization. We are interested in the major part of this work in the study of sharp inequalities relating different geometric and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::d27ded1e0c47c39ab64614fe9f25c108
https://tel.archives-ouvertes.fr/tel-03253019
https://tel.archives-ouvertes.fr/tel-03253019
Autor:
Meng, Long
Publikováno v:
Spectral Theory [math.SP]. Université Paris sciences et lettres, 2020. English. ⟨NNT : 2020UPSLD029⟩
This thesis is a rigorous study of the N-body problem in Coulomb interaction and some of its approximations in non relativistic and relativistic quantum chemistry. For the N-body stationary or time-dependent Schrödinger problem, we generalize theore
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::b5e4f5d932b6fa5daf3b59d6c2cd8c7b
https://tel.archives-ouvertes.fr/tel-03278453/document
https://tel.archives-ouvertes.fr/tel-03278453/document
Autor:
Bernard Paolantoni, Sandrine
Publikováno v:
Théorie spectrale [math.SP]. Institut Polytechnique de Paris, 2020. Français. ⟨NNT : 2020IPPAE005⟩
This thesis achieves a theoretical and numerical studies of cavities partially filled with a negative material, that is a material for which the magnetic permeability and/or the electric permittivity (or at least their real part) become negative in s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::05c9de49654812b6eafa710b70466c37
https://tel.archives-ouvertes.fr/tel-02996725
https://tel.archives-ouvertes.fr/tel-02996725
Autor:
Garrigue, Louis
Publikováno v:
Mathematical Physics [math-ph]. Université Paris sciences et lettres, 2020. English. ⟨NNT : 2020UPSLD018⟩
Density functional theory (DFT) is the most efficient method to model matter at the microscopic scale. Its range of applicability is very wide, covering atoms, molecules, solids, fluids. Despite its tremendous success in physics and quantum chemistry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::89e561d84eaff53ff7ec74cd9b1fae69
https://tel.archives-ouvertes.fr/tel-03275324/file/2020UPSLD018.pdf
https://tel.archives-ouvertes.fr/tel-03275324/file/2020UPSLD018.pdf
Autor:
Hamidouche, Mounia
Publikováno v:
Signal and Image processing. Université Côte d'Azur, 2020. English. ⟨NNT : 2020COAZ4019⟩
We study random geometric graphs (RGGs) to address key problems in complex networks. An RGG is constructed by uniformly distributing n nodes on a torus of dimension d and connecting two nodes if their distance does not exceed a certain threshold. Thr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2592::79aa3bf1396c5f8b98c2f8a6d3b52911
https://tel.archives-ouvertes.fr/tel-03135086
https://tel.archives-ouvertes.fr/tel-03135086