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2 Seminari a Pavia: Jorge Bolanos e Tomasz Tylec
by Carbone Raffaella 25 Feb '15

25 Feb '15

Cari colleghi, vi annuncio che mercoledì 4 marzo, alle ore 14 precise, nell'aula Beltrami del Dipartimento di Matematica dell'Universita' di Pavia, vi saranno due seminari (entrambi nell'ambito del progetto FIRB 2010 "*Quantum Markov Semigroups and their empirical estimation*"), tenuti da Jorge Bolanos-Servin e Tomasz Tylec Seguono titoli e sunti. Distinti saluti, Raffaella Carbone ----------------------------------------------------------------------- Primo Seminario, ore 14:00 precise: Jorge Bolanos-Servin (Università UAM, Città del Messico) "Some spectral properties of Circulant Quantum Markov Semigroups" Abstract. Many symetries of $\mathbb Z_p$ are inherited by Circulant matrices , therefore widely used in many areas of mathematics. The class of Circulant QMS although described in a simple way provide examples to better understand more general ideas. In this talk i will review the relationship between the eigenvalues and eigenvectors of a Circulant matrix and a Circulant QMS GKSL generator. This will lead to prove that the spectral gap is strictly positive. ------------------------------------------------------------------------- Secondo Seminario, ore 15 precise: Tomasz Tylec (Istituto di Fisica Teorica, Varsavia) "Generalised probability, quantum logics and non-signalling theories" Abstract: Since 1990s some physicist working on quantum information theory become interested in the so-called no-signalling theories. These are very intuitive, in some sense minimal, models of compound systems. It seemed that such theories are more general than quantum mechanics. Unfortunately, they suffer from the lack of precise mathematical framework within its properties can be rigorously studied. Our aim was to find such framework and study the basic properties of most widely discussed example of non-signalling system. The most natural choice led us to the so called quantum logics. The idea stems from the works of Birkhoff and von Neumann and after many years of development it evolved into sophisticated theory of partially ordered sets. What is important such structures can be interpreted as models of a generalised probability. This allows rigorous review of previously obtained results about non-signalling theories. -- Raffaella Carbone, PhD Ricercatore di Probabilità e Statistica Matematica Dipartimento di Matematica dell'Università degli Studi di Pavia

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[Fwd: 10 PhD Positions at GSSI]
by davide gabrielli 23 Feb '15

23 Feb '15

*DO NOT REPLY TO THIS ADDRESS* *For informations *please contact info(a)gssi.infn.it *PLEASE DIFFUSE BETWEEN INTERESTED PEOPLE* *WE APOLOGIZE FOR MULTIPLE E-MAILS* *Information and details on* *http://www.gssi.infn.it/phd/ <http://www.gssi.infn.it/phd/>* The GSSI in L'Aquila http://www.gssi.infn.it has open a call for 10 positions for the PhD program *DEADLINE April 15, 2015 - 6pm* APPLICATIONS ON LINE ONLY DO NO SEND ANYTHING IN DIFFERENT WAYS, IT WILL NOT GET ANY CONSIDERATION PROGRAM TITLE: Mathematics in Natural, Social and Life Sciences The yearly amount of the scholarship is of EURO 16.159,91 gross Official language of the PhD Programs: English Duration: 3 years Activities start on November 1st 2015 TOPICS: Stochastic Analysis, PDEs, Mathematical Modeling, Numerical Methods Applicant are required to upload also a file containing a synthetic report of the core courses followed on the following topics: 1. 1- Partial Differential Equations 2. 2- Probability/stochastic processes 3. 3- Functional Analysis 4. 4- Numerical Analysis 5. 5- Physics/continuum mechanics/fluid dynamics For each course in this area, students should provide a short syllabus (no more than 10 lines) main textbooks, name of the instructors and possibly the link to the course home page. Facilities and benefits - All PhD students will have tuition fees waived; - A ll PhD students will have free accommodation on GSSI facilities - A ll PhD students will have free luncheon vouchers - A ll PhD students will be covered by insurance against any accident and/or injury that may occur while carrying out their PhD activities. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Seminario di Probabilita' - Universita' di Padova
by alessandra bianchi 23 Feb '15

23 Feb '15

Ho il piacere di invitarvi al seguente seminario, che si terrà venerdì 27 Febbraio alle ore 14:30, nell'aula 2BC30 del Dipartimento di Matematica dell'Universita' degli Studi di Padova. SPEAKER: Elisabetta Scoppola (Dip. di Matematica - Università di Roma Tre) TITLE: Conditioned, quasi-stationary, restricted measures and escape from metastable states ABSTRACT: Metastability and first hitting are discussed in a quite general case including top in at random shuffle. (Joint work with R.Fernandez, F.Manzo, F.R.Nardi, J.Sohier) -- Alessandra Bianchi Dip. di Matematica Pura e Applicata Università di Padova Via Trieste, 63 - 35121 Padova, Italy phone: +39 049 827 14 06 fax: +39 049 827 14 28 e-mail: bianchi(a)math.unipd.it http://www.math.unipd.it/~bianchi/

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Workshop “Control Theory and Related Topics” .
by Fulvia Confortola 23 Feb '15

23 Feb '15

? Si segnala che il 13 e 14 aprile 2015 ci sarà presso il Dipartimento di Matematica Politecnico di Milano il convegno “Control Theory and Related Topics”, su controllo deterministico e stocastico ed equazioni di evoluzione. La registrazione è libera ma obbligatoria. E' possibile registrarsi su https://www.eko.polimi.it/index.php/CTRT/CTRT/schedConf/registration Ulteriori informazioni sono disponibili alla pagina web della conferenza https://www.eko.polimi.it/index.php/CTRT/CTRT Gli organizzatori locali Fulvia Confortola, Monica Conti, Elsa Marchini e Giuseppina Guatteri?

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seminario Macci in Bicocca cancellato
by Fabio Bellini 23 Feb '15

23 Feb '15

Il seminario di Claudio Macci previsto per mercoledì 25 febbraio in Bicocca è rimandato per influenza. Seguirà un nuovo annuncio. Saluti Prof. Fabio Bellini Department of Statistics and Quantitative Methods University of Milano-Bicocca Via Bicocca degli Arcimboldi 8, 20126 Milano 0039-2-64483119 http://www.economia.unimib.it/bellini http://scholar.google.it/citations?user=P61L8P4AAAAJ&hl=it

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corso di dottorato di Fabio Toninelli a Roma Tre
by Pietro Caputo 20 Feb '15

20 Feb '15

Il prof. Fabio Toninelli (Univ. Lyon 1, France) terra' un corso di dottorato di 12 ore circa presso il dipartimento di Matematica e Fisica di Roma Tre. Title: Dimer models: thermodynamics, fluctuations and Glauber dynamics Dates: March 9, 11, 16, 18, 23, 25, 30 and April 1st, 2015 Time:11.00-12.45 Location: Room 311 (third floor, palazzina C) Dipartimento di Matematica e Fisica, Roma Tre, L.go Murialdo 1 - 00146 Roma Course description: We will discuss several aspects of the mathematical theory of models of lattice dimers. These classical, two- dimensional statistical mechanics models are in certain sense “exactly solvable” (Kasteleyn, 1961). Recently there is a revival of interest in dimer models among probabilists and mathematical physiciscs, due to their properties of conformal invariance and of “Gaussian Free Field”-type fluctuations. Another aspect of great interest (in probability and theoretical computer science) is the study of the associated Markov dynamics (Glauber dynamics). In particular, a natural question concerns the speed of convergence of the dynamics to its invariant measure. Contents: – Kasteleyn theory (computation of the partition function) – dimer-dimer correlations, determinantal representation – dimer models as “lattice free fermions” – height function and its convergence to the “Gaussian Free Field” – thermodynamic limit: translation-invariant Gibbs states and limit shape – Glauber dynamics for dimer models. Connection with the zero-temperature – The problem of the speed of convergence

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Conferma Seminario Prof. L. Goldstein a RM1
by Fabio Spizzichino 20 Feb '15

20 Feb '15

*Si conferma l'orario del seminario indicato qui di seguito* Grazie per l'attenzione Fabio Spizzichino =========== *V**enerdì 20 febbraio 2015* Ore 14:00, Aula di Consiglio Seminario di Probabilità Larry Goldstein (University of Southern California) *Normal approximation for recovery of structured unknowns in high dimension: Steining the Steiner formula* Intrinsic volumes of convex sets are natural geometric quantities that also play important roles in applications. In particular, the discrete probability distribution L(VC) given by the sequence v{0},...,v{d} of conic intrinsic volumes of a closed convex cone C in Rd summarizes key information about the success of convex programs used to solve for sparse vectors, and other structured unknowns such as low rank matrices, in high dimensional regularized inverse problems. The concentration of VC implies the existence of phase transitions for the probability of recovery of the unknown in the number of observations. Additional information about the probability of recovery success is provided by a normal approximation for VC. Such central limit theorems can be shown by first considering the squared length GC of the projection of a Gaussian vector on the cone C. Applying a second order Poincar´e inequality, proved using Stein’s method, then produces a non-asymptotic total variation bound to the normal for L(GC). A conic version of the classical Steiner formula in convex geometry translates finite sample bounds and a normal limit for GC to that for VC. Joint with Ivan Nourdin and Giovanni Peccati

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Fwd: Fwd: postdoc opening - FMC2 (fwd)
by Tiziano Vargiolu 19 Feb '15

19 Feb '15

-------- Messaggio Inoltrato -------- Oggetto: Fwd: postdoc opening - FMC2 Data: Mon, 16 Feb 2015 11:29:09 +0000 Mittente: Cathal Brugha <cathal.brugha(a)UCD.IE> Rispondi-a: Cathal Brugha <cathal.brugha(a)UCD.IE> A: ORNET(a)JISCMAIL.AC.UK There is an opening for a postdoctoral researcher as part of the Financial Mathematics Computation Cluster (FMC2) collaboration between Industry, University College Dublin, Dublin City University and NUI Maynooth.http://www.isin.ie/go/case_studies/collaboration/financial-mathematics-comp utation-cluster-fmc2--604 Applications (through UCD HR Job Ref 007175 - http://www.ucd.ie/hr/jobvacancies) are due by 2 March. -- Prof Michael O'Neill Director UCD Complex & Adaptive Systems Laboratory (CASL) ICON Chair of Business Analytics School of Business University College Dublin http://casl.ucd.ie http://ncra.ucd.ie

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Seminario di F. Hubalek a Milano-Bicocca (03.03.2015)
by Francesco Caravenna 19 Feb '15

19 Feb '15

Martedì 3 marzo 2015 alle ore 15:30, nell'aula 3014 del Dipartimento di Matematica e Applicazioni dell'Università di Milano-Bicocca (edificio U5, via Cozzi 55, Milano), Friedrich Hubalek (TU Wien) terrà un seminario dal titolo Brownian excursion limits for the avalanche length in a binomial limit order book model Trovate il sommario di seguito. Tutti gli interessati sono invitati a partecipare. Francesco Caravenna %%%%%%%%%%%%%%%%%% Abstract: We briefly describe the mechanics of a stylized limit order book model for an electronic exchange, which is based on the simple symmetric random walk. While the order volume is a spacial process, we take up the study of the avalanche length of trades, that was begun by Thorsten Rheinlaender and his students in a Brownian motion model. By more or less elementary limit calculations we connect to Ito's theory of Brownian excursions. In doing so we briefly, but inevitably meet the error, gamma, zeta, xi, theta, Bessel, and the Gauss hypergeometric function. We derive the generating function for the simplified and full avalanche length, their Brownian limits, and study the distribution of the simplified avalanche length in some detail. This is joint work with Thorsten Rheinlaender and Sabine Sporer. %%%%%%%%%%%%%%%%%% -- _________________________________________ Francesco Caravenna Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca Via Cozzi 55, 20125 Milano, Italy http://www.matapp.unimib.it/~fcaraven/ _________________________________________

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Seminario Giovanni Valente al Politecnico di Milano
by Matteo Probo Siro Francesco Gregoratti 19 Feb '15

19 Feb '15

Si avvisa che in data 11-3-2015, alle ore 15:00 , presso Aula Consiglio VII piano, Dipartimento di Matematica, ed. 14, Campus Leonardo, nell'ambito delle iniziative del Dipartimento di Matematica del Politecnico di Milano, si svolgerà il seguente seminario: Titolo: Relativistic Causality and Local Disentanglement in Quantum Field Theory Relatore: Giovanni Valente, University of Pittsbur Abstract: La nozione di entanglement fra sistemi quantistici separati pone due problemi fondamentali in filosofia della meccanica quantistica. Primo, le correlazioni non-locali che ne derivano sembrano determinare un conflitto con la condizione di causalità relativistica, che implica che processi causali non possano propagarsi ad una velocità superiore a quella della luce, sollevando cosí una questione di incompatibilità con la teoria della relatività speciale di Einstein. Secondo, la presenza dell'entanglement sembra pregiudicare la possibilità di ottenere una suddivisione del mondo microscopico in sistemi fisici indipendenti. In questo seminario, si discuteranno tali problemi nel contesto della formulazione algebrica della teoria quantistica dei campi. Si inizierà mostrando come si possa derivare un teorema sull'impossibilità di inviare messaggi superluminali sulla base di operazioni locali. Successivamente, si dimostrerà l'esistenza di operazioni locali che hanno l'effetto di distruggere l'entanglement fra campi quantistici separati, soddisfacendo in tal modo ad una condizione necessaria per la loro indipendenza reciproca. Matteo Gregoratti

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