| Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente Prochaine révisionLes deux révisions suivantes |
| mega:seminaire [2019/01/22 14:03] – [Prochaine séance] male | mega:seminaire [2019/05/06 11:05] – [Calendrier 2018-2019] male |
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| * **Calendrier.** https://calendar.google.com/calendar/ical/qn5qq7dlmp38sc624s4png8umc%40group.calendar.google.com/public/basic.ics | * **Calendrier.** https://calendar.google.com/calendar/ical/qn5qq7dlmp38sc624s4png8umc%40group.calendar.google.com/public/basic.ics |
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| * **Organisateurs 2017-2018.** | * **Organisateurs 2018-2019.** |
| * Matinée des thésards : [[http://google.com/search?q=Raphaël+Butez+ ceremade|Raphaël Butez]] [[butez@ceremade.dauphine.fr]] et [[http://google.com/search?q=Nathan+Noiry+ ceremade|Nathan Noiry]] [[noirynathan@gmail.com]] | * Matinée des thésards : [[http://google.com/search?q=Nathan+Noiry+ ceremade|Nathan Noiry]] [[noirynathan@gmail.com]] |
| * Exposés de l'après-midi : [[http://www.normalesup.org/~dumaz/|Laure Dumaz]] [[dumaz@ceremade.dauphine.fr]] et [[http://camillemale.com|Camille Male]] [[camille.male@math.u-bordeaux.fr]] | * Exposés de l'après-midi : [[http://www.normalesup.org/~dumaz/|Laure Dumaz]] [[dumaz@ceremade.dauphine.fr]] et [[http://camillemale.com|Camille Male]] [[camille.male@math.u-bordeaux.fr]] |
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| {{ :mega:20141121_153039.jpg?400 |}} | {{ :mega:20141121_153039.jpg?400 |}} |
| ===== Prochaine séance ===== | ===== Prochaine séance ===== |
| * 10h30-12h00: mini cours par **[[https://www.math.u-psud.fr/~emaurel/|Édouard Maurel-Segala]]** // //\\ | * Vendredi **10 Mai**, salle 314 |
| * 14h00-15h00: **[[https://sites.google.com/view/franck-gabriel-en/home|Franck Gabriel]]** ////\\ | * mini cours par **[[https://math.unice.fr/~dmitsche/|Dieter Mitsche]]** //Graphes aléatoires hyperboliques et trou spectral du Laplacien sur ces graphes//Random hyperbolic graphs (RHG) were proposed rather recently (2010) as a model of real-world networks. Informally speaking, they are like random geometric graphs where the underlying metric space has negative curvature (i.e., is hyperbolic). In contrast to other models of complex networks, RHG simultaneously and naturally exhibit characteristics such as sparseness, small diameter, non-negligible clustering coefficient and power law degree distribution. In the first part we will give a slow pace introduction to RHG, explain why they have attracted a fair amount of attention and then survey most of what is known about this promising infant model of real-world networks. In the second part we will explain more in detail the spectral gap, and time permitting, also other parameters of this model.\\ |
| * 15h00-16h30: **[[https://www.math.uni-sb.de/ag/speicher/weber.html|Moritz Weber]]** //Quantum symmetries of finite graphs and of noncommutative notions of independence//\\ | * 14h00-15h00: **[[https://davidgarciaz.wixsite.com/math|David Garcia Zelada]]** //Extremal particles of radial determinantal Coulomb gases//The Coulomb gases we are interested in can be understood as two-dimensional systems of negatively charged particles confined by a positively charged radial background. The distribution of the particles far from the origin will be seen to exhibit different behaviors. A simple argument of this fact will be given and the analogous random polynomial models will be also discussed. This is based on a joint work with Raphael Butez.\\ |
| | * 15h30-16h30: **[[https://www-m7.ma.tum.de/bin/view/Analysis/SimoneWarzel|Simone Warzel]]** //Hierarchical random matrices and operators//Hierarchical random matrices (HM) serve as an more tractable simplification of power-law random band matrices (PRBM). As far as their (de)localisation properties are concerned, they are predicted to lie in the same universality class as PRBM. Their analysis is facilitated by a renormalization group which has deformed GOE matrices as one of its building blocks. In this talk, I will review results on HM. In particular, I will explain a SDE approach to a proof of local laws and delocalisation. This talk is based on joint works with P. Soosten.\\ |
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| * Vendredi **8 Février, salle 201** | |
| * 10h30-12h00: mini cours par **[[https://www.math.u-psud.fr/~emaurel/|Édouard Maurel-Segala]]** // //\\ | |
| * 14h00-15h00: **[[https://sites.google.com/view/franck-gabriel-en/home|Franck Gabriel]]** ////\\ | |
| * 15h30-16h30: **[[https://www.math.uni-sb.de/ag/speicher/weber.html|Moritz Weber]]** //Quantum symmetries of finite graphs and of noncommutative notions of independence//In mathematics, symmetries are usually modeled by groups; in modern theories however, we sometimes need to go beyond groups in order to capture symmetry: We need quantum groups. In this talk, I will briefly motivate and introduce the concept of compact matrix quantum groups by Woronowicz from the 1980's based on C*-algebras. I will then focus on two aspects. Firstly, I will survey recent developments in the theory of quantum automorphism groups of graphs. This is a very young but promising field initiated by Bichon and Banica about fifteen years ago. Together with my PhD student Simon Schmidt, we showed that the quantum symmetry group of a graph C*-algebra is exactly the quantum automorphism group of the graph, hence the graph C*-algebra preserves the quantum symmetries of the underlying graph. A second focus of my talk will be on distributional symmetries for noncommutative independence concepts such as Voiculescu's free independence, Boolean independence or bi-free independence. For all these notions, we have a de Finetti type theorem characterizing iid sequences by distributional symmetries. The technical details of the talk will be mostly algebraic and no knowledge on C*-algebras or quantum groups is assumed.\\ | |
| ===== Calendrier 2018-2019 ===== | ===== Calendrier 2018-2019 ===== |
| * Vendredi **12 Octobre**, salle 201 | * Vendredi **12 Octobre**, salle 201 |
| * 15h30-16h30: **[[https://people.kth.se/~holcomb/|Diane Holcomb]]** //On the centered maximum of the Sine beta process//\\ | * 15h30-16h30: **[[https://people.kth.se/~holcomb/|Diane Holcomb]]** //On the centered maximum of the Sine beta process//\\ |
| * Vendredi **8 Février**, salle 201 | * Vendredi **8 Février**, salle 201 |
| * 10h30-12h00: mini cours par **[[https://www.math.u-psud.fr/~emaurel/|Édouard Maurel-Segala]]** // //\\ | * 10h30-12h00: mini cours par **[[https://www.math.u-psud.fr/~emaurel/|Édouard Maurel-Segala]]** //Étude de modèles de matrices par la méthode des cumulants libres//\\ |
| * 14h00-15h00: **[[https://sites.google.com/view/franck-gabriel-en/home|Franck Gabriel]]** ////\\ | * 14h00-15h00: **[[https://sites.google.com/view/franck-gabriel-en/home|Franck Gabriel]]** //Schur-Weyl-Jones duality and permutation-invariant random matrices//\\ |
| * 15h30-16h30: **[[https://www.math.uni-sb.de/ag/speicher/weber.html|Moritz Weber]]** //Quantum symmetries of finite graphs and of noncommutative notions of independence//\\ | * 15h30-16h30: **[[https://www.math.uni-sb.de/ag/speicher/weber.html|Moritz Weber]]** //Quantum symmetries of finite graphs and of noncommutative notions of independence//\\ |
| * Vendredi **15 Mars** salle 421 | * Vendredi **15 Mars** salle 421 |
| * mini cours par **[[https://www.di.ens.fr/~lelarge/|Marc Lelarge]]** ////\\ | * mini cours par **[[https://www.di.ens.fr/~lelarge/|Marc Lelarge]]** //The cavity method for the spiked Wigner model//\\ |
| * 14h00-15h00: **[[http://math.univ-lyon1.fr/~lancien/|Cécilia Lancien]]** ////\\ | * 14h00-15h00: **[[http://math.univ-lyon1.fr/~lancien/|Cécilia Lancien]]** //Random correlation matrices: when are they with high probability |
| * 15h30-14h30: **[[http://pub.ist.ac.at/~dschroed/|Dominik Schröder]]** ////\\ | classical or quantum?//\\ |
| * pas de séance en **Avril** car Conférence du 15 au 19 à Luminy | * 15h30-16h30: **[[http://pub.ist.ac.at/~dschroed/|Dominik Schröder]]** //Cusp Universality for Wigner-type Random Matrices//\\ |
| | * pas de séance en **Avril** car [[https://conferences.cirm-math.fr/1949.html|Conférence du 15 au 19 Avril au CIRM]] |
| * Vendredi **10 Mai**, salle 314 | * Vendredi **10 Mai**, salle 314 |
| | * mini cours par **[[https://math.unice.fr/~dmitsche/|Dieter Mitsche]]** //Graphes aléatoires hyperboliques et trou spectral du Laplacien sur ces graphes//\\ |
| | * 14h00-15h00: **[[https://davidgarciaz.wixsite.com/math|David Garcia Zelada]]** //Extremal particles of radial determinantal Coulomb gases//\\ |
| | * 15h30-16h30: **[[https://www-m7.ma.tum.de/bin/view/Analysis/SimoneWarzel|Simone Warzel]]** //Hierarchical random matrices and operators//\\ |
| * Vendredi **14 Juin**, salle 201 | * Vendredi **14 Juin**, salle 201 |
| * 14h00-15h00: **[[https://cims.nyu.edu/~dubach/|Guillaume Dubach]]** ////\\ | * 14h00-15h00: **[[https://cims.nyu.edu/~dubach/|Guillaume Dubach]]** ////\\ |
| ===== Exposés 2017-2018 ===== | ===== Exposés 2017-2018 ===== |
| | * **Organisateurs 2017-2018.** |
| | * Matinée des thésards : [[http://google.com/search?q=Raphaël+Butez+ ceremade|Raphaël Butez]] [[butez@ceremade.dauphine.fr]] et [[http://google.com/search?q=Nathan+Noiry+ ceremade|Nathan Noiry]] [[noirynathan@gmail.com]] |
| | * Exposés de l'après-midi : [[http://www.normalesup.org/~dumaz/|Laure Dumaz]] [[dumaz@ceremade.dauphine.fr]] et [[http://camillemale.com|Camille Male]] [[camille.male@math.u-bordeaux.fr]] |
| * Vendredi **8 décembre** | * Vendredi **8 décembre** |
| * 10h30-12h00: mini cours par **[[http://www.normalesup.org/~menard/|Laurent Ménard]]** sur la méthode des séries génératrices | * 10h30-12h00: mini cours par **[[http://www.normalesup.org/~menard/|Laurent Ménard]]** sur la méthode des séries génératrices |
| ===== Année 2016-2017 ===== | ===== Année 2016-2017 ===== |
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| * **Organisateurs 2016-2017.** | * **Organisateurs 2016-2017.** |
| * Matinée des thésards : [[http://google.com/search?q=RSéaphaël+Butez+ ceremade|Raphaël Butez]] [[butez@ceremade.dauphine.fr]] | * Matinée des thésards : [[http://google.com/search?q=RSéaphaël+Butez+ ceremade|Raphaël Butez]] [[butez@ceremade.dauphine.fr]] |
| * Exposés de l'après-midi : [[http://www.normalesup.org/~dumaz/|Laure Dumaz]] [[dumaz@ceremade.dauphine.fr]] et [[http://camillemale.com|Camille Male]] [[camille.male@math.u-bordeaux.fr]] | * Exposés de l'après-midi : [[http://www.normalesup.org/~dumaz/|Laure Dumaz]] [[dumaz@ceremade.dauphine.fr]] et [[http://camillemale.com|Camille Male]] [[camille.male@math.u-bordeaux.fr]] |
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| * Vendredi **2 Juin 2017**, salle 421 le matin, salle 314 l'après midi | * Vendredi **2 Juin 2017**, salle 421 le matin, salle 314 l'après midi |