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Tuesday 29 May 2018, 11:30 at LPTENS, LPTENS library STR-LPT-ENS-HE (Séminaire commun LPTENS/LPTHE) hep-th
Jun Nian ( IHES ) TBA
Abstract: TBA

Tuesday 29 May 2018, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Cédric Deffayet ( IAP ) Galileon p-form theories
Abstract: I will discuss the generalization to p-forms of the Galileon idea: to construct the most general theory of an (abelian gauge invariant) p-form with (strictly) second order field equations. Such theory have recently be fully classified for space-time dimension strictly smaller than 12. The covariantization of these theories will also be discussed.

Tuesday 29 May 2018, 17:15 at DPT-PHYS-ENS, Jean Jaures (29 rue d'Ulm) SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) physics.bio-ph
William Bialek ( Princeton University ) Towards a renormalization group for networks of neurons
Abstract: TBA

Thursday 31 May 2018, 10:00 at IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th
David Kutasov ( U Chicago ) TBA

Thursday 31 May 2018, 11:45 at IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th
Clay Cordova ( IAS ) TBA

Friday 1 June 2018, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/197 )
COURS (Cours) cond-mat|q-bio
Rémi Monasson ( ENS Paris ) Unsupervised neural networks: from theory to systems biology (5/6)
Abstract: Artificial neural networks, introduced decades ago, are now key tools for automatic learning from data. This series of six lectures will focus on a few neural network architectures used in the context of unsupervised learning, that is, of unlabeled data. \par In particular we will focus on dimensional reduction, feature extraction, and representation building. We will see how statistical physics, in particular the techniques and concepts of random matrix theory and disordered systems, can be used to understand the properties of these algorithms and the phase transitions taking place in their operation. \par Special attention will be devoted to the so-called high-dimensional inference setting, where the numbers of data samples and of defining parameters of the neural nets are comparable. The general principles will be illustrated on recent applications to data coming from neuroscience and genomics, highlighting the potentialities of unsupervised learning for biology. \par Some issues: \\ - What is unsupervised learning? \\ - Hebbian learning for principal component analysis: retarded-learning phase transition and prior information. \\ - Bipartite neural nets and representations: auto-encoders, restricted Boltzmann machines, Boltzmann machines. \\ - Recurrent neural nets: from point to finite-dimensional attractors, temporal sequences.
Attachments:
  • 2017-2018.pdf (4503344 bytes) OPEN
  • 2018_Monasson.pdf (4507514 bytes) OPEN

Monday 4 June 2018, 09:00 at IPHT, Amphi Claude Bloch, Bât. 774
( https://indico.in2p3.fr/event/17044/ )
WORK-CONF (Workshop or Conference) physics
... ( IPhT ) 23th Itzykson Conference (June 04-06, 2018): Statistical Physics of Disordered and Complex Systems, a Tribute to Cirano De Dominicis
Abstract: The 23rd Claude Itzykson Conference, which will take place in the Bloch Amphitheater from June 4 to 6, 2018, is dedicated to our colleague and friend Cirano De Dominicis who was the head and a prominent member of our laboratory for many years. \\ \par The themes of the conference will cover the scientific interests of Cirano: \\ Quantum Systems, \\ Out of Equilibrium Statistical Physics, \\ Disordered Systems and Spin Glasses, \\ Interdisciplinary Systems. \\ \\ \\ The website of the conference is: https://indico.in2p3.fr/event/17044/ \\ \\ Organizing committee: Giulio Biroli, Edouard Brézin, Henri Orland and Laure Sauboy (secretary). \\ \\ Sponsors and benefactors: IPhT (CEA and CNRS), DRF, LabEx LMH.

Tuesday 5 June 2018, 11:30 at LPTENS, LPTENS library STR-LPT-ENS-HE (Séminaire commun LPTENS/LPTHE) hep-th
Pietro Longhi ( Uppsala ) TBA
Abstract: TBA

Tuesday 5 June 2018, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Tomislav Prokopec ( Utrecht University ) TBA

Tuesday 5 June 2018, 16:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-HEP (Séminaire de physique des particules et de cosmologie) hep-ph
Csaba Csaki ( Cornell University ) (TBA)

Friday 8 June 2018, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/197 )
COURS (Cours) cond-mat|q-bio
Rémi Monasson ( ENS Paris ) Unsupervised neural networks: from theory to systems biology (6/6)
Abstract: Artificial neural networks, introduced decades ago, are now key tools for automatic learning from data. This series of six lectures will focus on a few neural network architectures used in the context of unsupervised learning, that is, of unlabeled data. \par In particular we will focus on dimensional reduction, feature extraction, and representation building. We will see how statistical physics, in particular the techniques and concepts of random matrix theory and disordered systems, can be used to understand the properties of these algorithms and the phase transitions taking place in their operation. \par Special attention will be devoted to the so-called high-dimensional inference setting, where the numbers of data samples and of defining parameters of the neural nets are comparable. The general principles will be illustrated on recent applications to data coming from neuroscience and genomics, highlighting the potentialities of unsupervised learning for biology. \par Some issues: \\ - What is unsupervised learning? \\ - Hebbian learning for principal component analysis: retarded-learning phase transition and prior information. \\ - Bipartite neural nets and representations: auto-encoders, restricted Boltzmann machines, Boltzmann machines. \\ - Recurrent neural nets: from point to finite-dimensional attractors, temporal sequences.
Attachments:
  • 2017-2018.pdf (4503344 bytes) OPEN
  • 2018_Monasson.pdf (4507514 bytes) OPEN

Monday 11 June 2018, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-PHM (Séminaire de physique mathématique) math-ph
Oleg Lisovyi ( Tours ) Fonctions tau et constantes de Widom-Dyson

Monday 11 June 2018, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) hep-th
Sergiu Klainerman ( Princeton University & IHES ) On the Mathematical Theory of Black Holes (1/4)
Abstract: The gravitational waves detected by LIGO were produced in the final faze of the inward spiraling of two black holes before they collided to produce a more massive black hole. The experiment is entirely consistent with the so called Final State Conjecture of General Relativity according to which generic solutions of the Einstein vacuum equations can be described, asymptotically, by a finite number of Kerr solutions moving away from each other. Though the conjecture is so very easy to formulate and happens to be validated by both astrophysical observations as well as numerical experiments, it is far beyond our current mathematical understanding. In fact even the far simpler and fundamental question of the stability of one Kerr black hole remains wide open. In my lectures I will address the issue of stability as well as other aspects the mathematical theory of black holes such as rigidity of black holes and the problem of collapse. The rigidity conjecture asserts that all stationary solutions the Einstein vacuum equations must be Kerr black holes while the problem of collapse addresses the issue of how black holes form in the first place from regular initial conditions. Recent advances on all these problems were made possible by a remarkable combination of geometric and analytic techniques which I will try to outline in my lectures.

Tuesday 12 June 2018, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Hayato Motohashi ( Yukawa Institute for Theoretical Physics, Kyoto University ) Constructing degenerate higher-order theories
Abstract: Scalar-tensor theories serve models for inflation and dark energy. Many efforts have been made recently for constructing the most general scalar-tensor theories with higher-order derivatives in their Lagrangian. Since higher-derivative theories are typically associated with Ostrogradsky ghost which causes unbounded Hamiltonian, it is important to clarify how to evade it. In this talk, I will explain construction of healthy degenerate theories with higher-order derivatives which circumvent Ostrogradsky ghost. The method also allows us to construct ghost-free theories with derivatives higher than second order in Lagrangian.

Tuesday 12 June 2018, 17:15 at DPT-PHYS-ENS, Jean Jaures (29 rue d'Ulm) SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) physics.plasm-ph
Amitava Bhattacharjee ( Princeton University ) Fast magnetic reconnection in space and astrophysical plasmas
Abstract: TBA

Wednesday 13 June 2018, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) hep-th
Sergiu Klainerman ( Princeton University & IHES ) On the Mathematical Theory of Black Holes (2/4)
Abstract: The gravitational waves detected by LIGO were produced in the final faze of the inward spiraling of two black holes before they collided to produce a more massive black hole. The experiment is entirely consistent with the so called Final State Conjecture of General Relativity according to which generic solutions of the Einstein vacuum equations can be described, asymptotically, by a finite number of Kerr solutions moving away from each other. Though the conjecture is so very easy to formulate and happens to be validated by both astrophysical observations as well as numerical experiments, it is far beyond our current mathematical understanding. In fact even the far simpler and fundamental question of the stability of one Kerr black hole remains wide open. In my lectures I will address the issue of stability as well as other aspects the mathematical theory of black holes such as rigidity of black holes and the problem of collapse. The rigidity conjecture asserts that all stationary solutions the Einstein vacuum equations must be Kerr black holes while the problem of collapse addresses the issue of how black holes form in the first place from regular initial conditions. Recent advances on all these problems were made possible by a remarkable combination of geometric and analytic techniques which I will try to outline in my lectures.

Friday 15 June 2018, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/198 )
COURS (Cours) astro-ph|hep-ph
Marco Cirelli ( LPTHE Paris ) Dark matter phenomenology (1/5)
Abstract: (TBA)
Attachments:
  • 2017-2018.pdf (4503344 bytes) OPEN

Tuesday 19 June 2018, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-GEN (Séminaire général du SPhT) physics
Gabriele Veneziano ( CERN et Collège de France ) (TBA)

Tuesday 19 June 2018, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) hep-th
Sergiu Klainerman ( Princeton University & IHES ) On the Mathematical Theory of Black Holes (3/4)
Abstract: The gravitational waves detected by LIGO were produced in the final faze of the inward spiraling of two black holes before they collided to produce a more massive black hole. The experiment is entirely consistent with the so called Final State Conjecture of General Relativity according to which generic solutions of the Einstein vacuum equations can be described, asymptotically, by a finite number of Kerr solutions moving away from each other. Though the conjecture is so very easy to formulate and happens to be validated by both astrophysical observations as well as numerical experiments, it is far beyond our current mathematical understanding. In fact even the far simpler and fundamental question of the stability of one Kerr black hole remains wide open. In my lectures I will address the issue of stability as well as other aspects the mathematical theory of black holes such as rigidity of black holes and the problem of collapse. The rigidity conjecture asserts that all stationary solutions the Einstein vacuum equations must be Kerr black holes while the problem of collapse addresses the issue of how black holes form in the first place from regular initial conditions. Recent advances on all these problems were made possible by a remarkable combination of geometric and analytic techniques which I will try to outline in my lectures.

Tuesday 19 June 2018, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Albino Hernandez Galeana ( University of Mexico ) TBA

Friday 22 June 2018, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/198 )
COURS (Cours) astro-ph|hep-ph
Marco Cirelli ( LPTHE Paris ) Dark matter phenomenology (2/5)
Abstract: (TBA)
Attachments:
  • 2017-2018.pdf (4503344 bytes) OPEN

Friday 22 June 2018, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) hep-th
Sergiu Klainerman ( Princeton University & IHES ) On the Mathematical Theory of Black Holes (4/4)
Abstract: The gravitational waves detected by LIGO were produced in the final faze of the inward spiraling of two black holes before they collided to produce a more massive black hole. The experiment is entirely consistent with the so called Final State Conjecture of General Relativity according to which generic solutions of the Einstein vacuum equations can be described, asymptotically, by a finite number of Kerr solutions moving away from each other. Though the conjecture is so very easy to formulate and happens to be validated by both astrophysical observations as well as numerical experiments, it is far beyond our current mathematical understanding. In fact even the far simpler and fundamental question of the stability of one Kerr black hole remains wide open. In my lectures I will address the issue of stability as well as other aspects the mathematical theory of black holes such as rigidity of black holes and the problem of collapse. The rigidity conjecture asserts that all stationary solutions the Einstein vacuum equations must be Kerr black holes while the problem of collapse addresses the issue of how black holes form in the first place from regular initial conditions. Recent advances on all these problems were made possible by a remarkable combination of geometric and analytic techniques which I will try to outline in my lectures.

Tuesday 26 June 2018, 11:30 at LPTENS, LPTENS library STR-LPT-ENS-HE (Séminaire commun LPTENS/LPTHE) hep-th
Julian Sonner ( Université de Genève ) TBA
Abstract: TBA

Tuesday 26 June 2018, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Emilian Dudas ( CPHT - Ecole Polytechnique ) TBA

Tuesday 26 June 2018, 17:15 at DPT-PHYS-ENS, Jean Jaures (29 rue d'Ulm) SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) physics.flu-dyn
William Young ( UC San Diego ) Long range propagation of ocean swell
Abstract: TBA

Friday 29 June 2018, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/198 )
COURS (Cours) astro-ph|hep-ph
Marco Cirelli ( LPTHE Paris ) Dark matter phenomenology (3/5)
Abstract: (TBA)
Attachments:
  • 2017-2018.pdf (4503344 bytes) OPEN

Tuesday 3 July 2018, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Léonie Canet ( Université de Grenoble ) Correlation functions in fully developed turbulence
Abstract: Turbulence is an ubiquitous phenomenon in natural and industrial fluid flows. Yet, it still lacks a satisfactory theoretical description. One of the main open issues is to calculate the statistical properties of the turbulent steady state, and in particular what is generically called intermittency effects, starting from the fundamental description of the fluid dynamics provided by Navier-Stokes equation. In this presentation, I will focus on isotropic and homogeneous turbulence in three-dimensional incompressible flows. In the first part, I will give an introduction on the basic phenomenology of turbulence, and show what are the typical manifestations of intermittency. In the second part, I will explain how one can derive exact asymptotic (i.e. at large wave- numbers) properties of the correlation functions in the turbulent state, using a field-theoretic approach, based on the Non-Perturbative Renormalisation Group, and compare them to numerical simulations and experiments.

Friday 6 July 2018, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/198 )
COURS (Cours) astro-ph|hep-ph
Marco Cirelli ( LPTHE Paris ) Dark matter phenomenology (4/5)
Abstract: (TBA)
Attachments:
  • 2017-2018.pdf (4503344 bytes) OPEN

Tuesday 10 July 2018, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Stéphane Lavignac ( IPhT ) TBA

Friday 13 July 2018, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/198 )
COURS (Cours) astro-ph|hep-ph
Marco Cirelli ( LPTHE Paris ) Dark matter phenomenology (5/5)
Abstract: (TBA)
Attachments:
  • 2017-2018.pdf (4503344 bytes) OPEN

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