3.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR1.1k papers
- Observatoire de la Côte d’AzurFR595 papers
- Lagrange LaboratoryFR303 papers
- Laboratoire Jean-Alexandre DieudonnéFR217 papers
- Observatoire de ParisFR183 papers
- Université Paris DiderotFR149 papers
- National Institute for AstrophysicsIT147 papers
- Institut de Physique de NiceFR131 papers
- Sapienza University of RomeIT119 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR118 papers
- Université Pierre-et-Marie-CurieFR118 papers
- European Southern ObservatoryCL108 papers
24 papers · 1 filter
Nonlinear Prediction of Solar Cycle 24
A. Kilcik, C. N. K. Anderson, J. P. Rozelot +3
Sunspot activity is highly variable and challenging to forecast. Yet forecasts are important, since peak activity has profound effects on major geophysical phenomena including spac…
How Gibbs distributions may naturally arise from synaptic adaptation mechanisms. A model-based argumentation
B. Cessac, H. Rostro, J. C. Vasquez +1
This paper addresses two questions in the context of neuronal networks dynamics, using methods from dynamical systems theory and statistical physics: (i) How to characterize the st…
Threshold of a Random Laser with Cold Atoms
Luis S. Froufe-Pérez, William Guerin, Rémi Carminati +1
We address the problem of achieving an optical random laser with a cloud of cold atoms, in which gain and scattering are provided by the same atoms. The lasing threshold can be def…
Energy ejection in the collapse of a cold spherical self-gravitating cloud
M. Joyce, B. Marcos, F. Sylos Labini
When an open system of classical point particles interacting by Newtonian gravity collapses and relaxes violently, an arbitrary amount of energy may in principle be carried away by…
A Pedagogical Discussion Concerning the Gravitational Energy Radiated by Keplerian Systems
C. Bracco, J. -P. Provost, P. Salati
We first discuss the use of dimensional arguments (and of the quadrupolar emission hypothesis) in the derivation of the gravitational power radiated on a circular orbit. Then, we s…
Newton polyhedra of discriminants of projections
Alexander Esterov
For a system of polynomial equations, whose coefficients depend on parameters, the Newton polyhedron of its discriminant is computed in terms of the Newton polyhedra of the coeffic…
Quasi-Kähler groups, 3-manifold groups, and formality
Alexandru Dimca, Stefan Papadima, Alexander I. Suciu
In this note, we address the following question: Which 1-formal groups occur as fundamental groups of both quasi-Kähler manifolds and closed, connected, orientable 3-manifolds. We…
On an extension of the notion of Reedy category
Clemens Berger, Ieke Moerdijk
We extend the classical notion of a Reedy category so as to allow non-trivial automorphisms. Our extension includes many important examples occuring in topology such as Segal's cat…
An Asymptotic Preserving Scheme for the Euler equations in a strong magnetic field
Pierre Degond, Fabrice Deluzet, Afeintou Sangam +1
This paper is concerned with the numerical approximation of the isothermal Euler equations for charged particles subject to the Lorentz force. When the magnetic field is large, the…
Monte Carlo Study of an Inhomogeneous Blume-Capel Model
S. M. Pittman, G. G. Batrouni, R. T. Scalettar
Systems of particles in a confining potential exhibit a spatially dependent density which fundamentally alters the nature of phase transitions that occur. A specific instance of th…
Nonlinear regularization techniques for seismic tomography
I. Loris, H. Douma, G. Nolet +2
The effects of several nonlinear regularization techniques are discussed in the framework of 3D seismic tomography. Traditional, linear, penalties are compared to so-calle…
Optical configuration and analysis of the AMBER/VLTI instrument
S. Robbe-Dubois, S. Lagarde, R. G. Petrov +23
This paper describes the design goals and engineering efforts that led to the realization of AMBER (Astronomical Multi BEam combineR) and to the achievement of its present performa…
From B[e] to A[e]. On the peculiar variations of the SMC supergiant LHA 115-S 23 (AzV 172)
Michaela Kraus, Marcelo Borges Fernandes, Jiri Kubat +1
Optical observations from 1989 of the SMC B[e] supergiant star S23 revealed the presence of photospheric HeI absorption lines. In our high-resolution optical spectra from 2000, how…
André-Quillen cohomology of algebras over an operad
Joan Millès
We study the André-Quillen cohomology with coefficients of an algebra over an operad. Using resolutions of algebras coming from Koszul duality theory, we make this cohomology theor…
Parallel Pricing Algorithms for Multi--Dimensional Bermudan/American Options using Monte Carlo methods
Mireille Bossy, Françoise Baude, Viet Dung Doan +2
In this paper we present two parallel Monte Carlo based algorithms for pricing multi--dimensional Bermudan/American options. First approach relies on computation of the optimal exe…
Characteristic varieties and logarithmic differential 1-forms
Alexandru Dimca
We introduce in this paper a hypercohomology version of the resonance varieties and obtain some relations to the characteristic varieties of rank one local systems on a smooth quas…
On Gamma-Ray Bursts
Remo Ruffini, Maria Grazia Bernardini, Carlo Luciano Bianco +12
(Shortened) We show by example how the uncoding of Gamma-Ray Bursts (GRBs) offers unprecedented possibilities to foster new knowledge in fundamental physics and in astrophysics. Af…
Theoretical interpretation of "long" and "short" GRBs
Carlo Luciano Bianco, Maria Grazia Bernardini, Letizia Caito +6
Within the "fireshell" model we define a "canonical GRB" light curve with two sharply different components: the Proper-GRB (P-GRB), emitted when the optically thick fireshell of el…
The "Fireshell" model in the Swift era
Carlo Luciano Bianco, Remo Ruffini
We here re-examine the validity of the constant-index power-law relation between the fireshell Lorentz gamma factor and its radial coordinate, usually adopted in the current Gamma-…
Theoretical interpretation of luminosity and spectral properties of GRB 031203
Carlo Luciano Bianco, Maria Grazia Bernardini, Pascal Chardonnet +3
We show how an emission endowed with an instantaneous thermal spectrum in the co-moving frame of the expanding fireshell can reproduce the time-integrated GRB observed non-thermal…
Prescription de la multiplicité des valeurs propres du laplacien de Hodge-de Rham
Pierre Jammes
On any compact manifold of dimension greater than 6, we prescribe the volume and any finite part of the spectrum Hodge Laplacian acting on -form for . In parti…
Symmetric tensors and symmetric tensor rank
Pierre Comon, Gene Golub, Lek-Heng Lim +1
A symmetric tensor is a higher order generalization of a symmetric matrix. In this paper, we study various properties of symmetric tensors in relation to a decomposition into a sum…
Semi-classical analysis of a random walk on a manifold
Gilles Lebeau, Laurent Michel
We prove a sharp rate of convergence to stationarity for a natural random walk on a compact Riemannian manifold . The proof includes a detailed study of the spectral theory…
Optimal Transport, Convection, Magnetic Relaxation and Generalized Boussinesq equations
Yann Brenier
We establish a connection between Optimal Transport Theory and classical Convection Theory for geophysical flows. Our starting point is the model designed few years ago by Angenent…