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Seminario KNAPIK
by Matteo Ruggiero 17 Oct '14

17 Oct '14

**************************************************************** STATISTICS SEMINARS @ COLLEGIO CARLO ALBERTO **************************************************************** Venerdi' 24 Ottobre 2014 alle ore 12:00, presso la sala rossa del Collegio Carlo Alberto, Moncalieri (TO), si terra' il seguente seminario: Bartek KNAPIK (Vrije Universiteit Amsterdam) CONVERGENCE RATES OF POSTERIOR DISTRIBUTIONS IN NONPARAMETRIC INVERSE PROBLEMS Abstract: Since the seminal works of Ghosal, Ghosh and van der Vaart (2000) and Shen and Wasserman (2001), posterior contraction has attracted much attention, resulting in the rich literature on this subject. However, these results are not suitable to deal with trully ill-posed inverse problems, where one is interested in the parameter of interest f, given noisy observations of its transformed version Kf. General theorems yield contraction results in some metric measuring the distance between Kf and Kf_0, whereas the interest lies in the distance betweend f and f_0, and these two metrics are not equivalent. In this talk we review (a part of) the existing literature on Bayesian approach to nonparametric inverse problems, and present a general contraction theorem. We show that in mildly ill-posed problems with conjugate priors, both empirical and hierarchical Bayes approaches lead to (nearly) optimal recovery of an infinite-dimensional parameter of interest. Moreover, using our general result, we obtain minimax adaptive concentration rates in two examples in the fixed-design regression setting. Tutti gli interessati sono invitati a partecipare. Il seminario e' organizzato dalla "de Castro" Statistics Initiative (http://www.carloalberto.org/stats) in collaborazione con il Collegio Carlo Alberto. Cordiali saluti, Matteo Ruggiero --- Matteo Ruggiero University of Torino and Collegio Carlo Alberto http://sites.carloalberto.org/ruggiero

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Seminario Kirone Mallick a Roma
by Gustavo Posta 17 Oct '14

17 Oct '14

The Asymmetric Simple Exclusion Process, a Review by Kirone Mallick (CEA, Saclay, Francia) Monday, 20 October 2014 from 16:00 to 18:00 (Europe/Rome) at Dip. di Fisica - Edificio G. Marconi ( Aula Conversi ) Abstract The asymmetric simple exclusion process plays the role of a paradigm to study various aspects of non-equilibrium statistical physics. It is a minimal model of interacting particles with transport, that displays interesting collective behaviour and breaks time-reversal symmetry. This system appears as a building block in more realistic descriptions of low-dimensional transport with constraints. During the last twenty years, a large number of exact results have been derived for the exclusion process. The aim of this talk is to review the main techniques used to study this system and some of the important results that have been obtained.

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MOSTRA e CONFERENZA sul matematico René Gateaux
by Nappo, Giovanna 16 Oct '14

16 Oct '14

Vi segnalo la Mostra (21.24 ottobre) e la conferenza (21 ottobre) su René Gateaux presso il Dipartimento di Matematica Università di Roma "La Sapienza" MOSTRA René Gateaux (1889-1914) Itinerario di una gioventù perduta: Dipartimento di Matematica "Guido Castelnuovo" Università di Roma "La Sapienza" 21 -24 ottobre 2014 René Gateaux era un giovane matematico francese. Circa un milione e mezzo di francesi sono morti durante la Prima Guerra Mondiale, e René Gateaux è stato uno di loro. Qualche tempo prima della sua prematura scomparsa, avvenuta nella notte tra il 2 e il 3 ottobre 1914, ebbe diversi contatti scientifici con la comunità matematica romana e in particolare con Vito Volterra. In occasione del centenario dalla morte di René Gateaux, nei locali del Dipartimento di Matematica Guido Castelnuovo (piano terra), si terrà una mostra sui suoi contributi scientifici e sulla sua breve vita: il caso di René Gateaux apporta qualche interessante contributo alla conoscenza del suo periodo storico. La mostra si può visitare durante l'orario di apertura del Dipartimento di Matematica: dalle 8 alle 20. L'ingresso è gratuito Consulenti scientifici: Laurent Mazliak (Université Pierre et Marie Curie, Paris) e Rossana Tazzioli (Université de Lille 1) Concezione grafica: Raphaël Petit Organizzazione locale: Giovanna Nappo e Fabio Spizzichino (Dipartimento di Matematica) CONFERENZA Martedì 21 ottobre, ore 15:30, in Aula Picone del Dipartimento di Matematica "Guido Castelnuovo", il Professor Laurent Mazliak terrà una conferenza introduttiva. René Gateaux (1889-1914) abstract: Nell'ottobre 1914, il giovane matematico René Gateaux fu ucciso nei primi combattimenti della prima guerra mondiale. Aveva 25 anni. La sua fortuna postuma fu di essere stato, durante la sua breve vita, in relazione con importanti matematici, in particolare con Vito Volterra, e di avere lasciato prima di andare in guerra delle carte che diventarono, nelle mani esperte di Paul Lévy, la fonte di sviluppi capitali per la matematica del '900. Nella conferenza, considerata come un'introduzione e un complemento alla mostra omonima presso il Dipartimento di Matematica "Guido Castelnuovo", verranno presentati diversi aspetti di questo sorprendente destino. La conferenza sarà preceduta da una breve introduzione alla derivata di Gateaux, tenuta dal Prof. Antonio Siconolfi (Università di Roma "La Sapienza").

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Fractional Calculus, Probability and Non-Local Operators: Second (and final) call for papers.
by Enrico Scalas 15 Oct '14

15 Oct '14

Second Call for papers Second Workshop on Fractional Calculus, Probability and Non-Local Operators: Applications and Recent Developments BCAM, Bilbao, Basque Country - Spain 10-14 November 2014 Research on non-local operators and related stochastic processes has witnessed a rapid expansion over the past years. These problems pose new challenges to both pure and applied mathematicians, at the interface of at least three wide fields: functional analysis, stochastic processes and partial differential equations, while providing a new paradigm in scientific modelling. Applications range from relativistic models of quantum physics and quantum field theory, to sub-diffusion experimentally observed in molecular physics, from anomalous transport in cells to leptokurtic price distributions in financial markets, or to long-range dynamics ranging from the nano-scale to the geophysical scale. This interaction between mathematics and applications is giving rise to new concepts and methods, and it will produce new challenging mathematical problems for many years to come. Programme Monday 10th - Wednesday 12th Mon 11:30-13:30 / 15:00-19:00 Tue 9:00-12:00 / 15:00-16:00 / 17:00-19:00 Wed 9:00-12:00 / 15:00–18:00 PhD/PostDoc level course on "Fractional Kinetics: Analytic and Probabilistic Approaches" Vassili Kolokoltsov (University of Warwick, UK) Jozsef Lorinczi (Loughborough University, UK) Enrico Scalas (University of Sussex, UK) Tue 16:00-17:00 BCAM Scientific Seminar J. M. Sanz-Serna (University “Carlos III” Madrid, Spain) “Nonsymplectic uses of symplectic integrators” Thursday 13th - Friday 14th Thu, Fri 9:30-12:00 / 15:00-17:30 Workshop with specialist talks presented by Invited Speakers and by young researchers. A permanent poster session will be organised as well. Invited Talks: Luisa Beghin (University "La Sapienza" Rome, Italy) ”Stable processes at Poisson times in connection with the fractional shift operator" Kamil Kaleta (University of Wroclawska, Poland) “Lévy processes with uniformly dominated sequences of jumps" Joseba Mendiguren (Mondragon University, Spain) “Fractional Calculus application on mechanical engineering problems" Paolo Paradisi (ISTI-CNR Pisa, Italy/BCAM, Spain) “stochastic processes for space-time fractional diffusion” Juan Luis Vazquez (Autonomous University of Madrid, Spain) “Nonlinear diffusion with fractional Laplacian operator” Grants are available for attendees. For registration write to fcpnlo(a)gmail.com, no registration fee is required. To submit your abstract for a poster or a presentation (deadline: 24th of October, 2014) and further information, please write to: fcpnlo(a)gmail.com Sincerely Yours, Jozsef Lorinczi Gianni Pagnini Enrico Scalas

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FLAFR: Bando 2014 - Borse Premio per lo svolgimento di tesi di laurea magistrale
by Irene Crimaldi 15 Oct '14

15 Oct '14

Bando 2014 - BORSE PREMIO PER LO SVOLGIMENTO DI TESI DI LAUREA MAGISTRALE. Le borse sono messe a disposizione dalla Fondazione Lucchese per l’Alta Formazione e la Ricerca (FLAFR). Gli argomenti di tesi sono: Tema 1: Crisi e innovazione. Tema 2: Modelli, metodologie e strumenti software per lo sviluppo e l'analisi di sistemi ICT. Tema 3: Modelli e metodologie per l'analisi delle reti complesse e loro applicazione. Tema 4: Metodologie e strumenti software per l'analisi e il controllo di sistemi dinamici. Tema 5: Modelli stocastici e metodologie statistiche per lo studio di problematiche in campo economico, informatico o ingegneristico. Tema 6: Modelli teorici, numerici e sperimentali per l'ottimizzazione delle proprietà superficiali della carta. Per ulteriori dettagli, potete consultare il link http://www.fondazioneluccheseafr.it/borse_tesi.html. Irene Crimaldi IMT Institute for Advanced Studies Lucca

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Seminario Giuliana Cortese (Università di Padova) - 28/10/2014
by Giacomo Aletti 14 Oct '14

14 Oct '14

Con preghiera di diffusione tra tutti i possibili interessati, scusandomi per invii multipli. Cordialmente, Giacomo Aletti -------------- Si comunica che in data 28 Ottobre 2014, ore 11, presso la Sala di Rappresentanza del Dipartimento di Matematica dell'Università degli Studi di Milano La dott.ssa Giuliana Cortese, del dipartimento di Statistica dell'Università di Padova, terrà un seminario dal titolo "Dynamic predictions via competing risks regression models with application to chemotherapy in breast cancer" Abstract In breast cancer, the risk for cardiotoxicity due to chemotherapy typically increases with the cumulative dose of treatment over time. Therefore, it is of interest to predict the cumulative risk for cardiotoxicity in a dynamic way, while controlling the competing risk for mortality. For this purpose, we consider a competing risks regression model with two events, cardiotoxicity and death. A second aim is to predict optimal cumulative doses along a given treatment time that keep the cumulative risk for cardiotoxicity below a certain threshold (e.g. <5%). We face these prediction problems with different regression models for competing risks, accounting for all the time-dependent information in the data. For example, some covariates are assumed to have time-varying effects, and the cumulative dose was included as (internal) time-dependent covariate into the models. A landmark analysis was used to obtain dynamic predictions. In this applied context, we compare the competing risks approach based on cause-specific hazards and the direct regression models that allow finding a one-to-one relationship between cumulative risks and covariates. These models were then employed to predict optimal cumulative doses at a sequence of landmark time points. To control and correct also for the increased risk of dying, we finally predict optimal cumulative doses when a illness-death model is considered. Implementation in R is also discussed. -- ------------------------------- Giacomo Aletti, Associate Professor ADAMSS Centre (ex MIRIAM) Advanced Applied Mathematical and Statistical Sciences Department of Mathematics (www.matematica.unimi.it) Via Saldini, 50 20133 Milano, Italy Tel: +39-02-503.16158 Fax:+39-02-503.16090 Cell: +39-340-9739142

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2014 Nicola Bruti Liberati Prize (IV edition)
by Tiziano Vargiolu 13 Oct '14

13 Oct '14

---------- Forwarded message ---------- Date: Mon, 13 Oct 2014 09:47:36 +0000 From: Daniele Marazzina <daniele.marazzina(a)polimi.it> To: "basso(a)unive.it" <basso(a)unive.it>, "vargiolu(a)math.unipd.it (vargiolu(a)math.unipd.it)" <vargiolu(a)math.unipd.it> Subject: 2014 Nicola Bruti Liberati Prize (IV edition) Con preghiera di diffusione tramite le vostre mailing-list. Grazie, Daniele Marazzina >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 2014 Nicola Bruti Liberati Prize (IV edition) The Bachelier Finance Society and the Department of Mathematics of the Politecnico di Milano, in cooperation with Springer, are proud to announce the 2014 Nicola Bruti Liberati Prize (IV edition) which is to be awarded annually for a doctoral thesis in all subjects of Mathematical Finance, such as, but not limited to: Derivative Pricing, Computational Finance, Econometrics and Statistical Methods applied to Finance, Risk Analysis, Portfolio Optimization, Probability Methods in Finance, and Numerical Methods in Finance. Nicola obtained an undergraduate degree from Bocconi University (2001) in Mathematical Finance. He died in 2007 in a traffic accident in Sydney, while he was completing his PhD thesis at the University of Technology. At that time, he was also cooperating with the Quantitative Finance group of the Department of Mathematics of the Politecnico di Milano. In order to commemorate Nicola, his family and the Department of Mathematics of the Politecnico di Milano offer an annual prize of E3.000 for the best doctoral thesis to be selected by a Committee appointed by the Bachelier Finance Society. Theses defended in 2013 and 2014 must be submitted no later than January 31st, 2015. The call for scholarship can be downloaded from the QFinLab web-site (www.mate.polimi.it/qfinlab) or at the following urls [ENG] http://www.mate.polimi.it/servizi/bandi_di_concorso/upload_bandi/iizw 6q/Bruti_Liberati_Prize_2014.pdf [ITA] http://www.mate.polimi.it/servizi/bandi_di_concorso/upload_bandi/iizw 6q/borsa_di_studio_Bruti_Liberati_2014.pdf

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2014 Nicola Bruti Liberati Prize (IV edition)
by Daniele Marazzina 13 Oct '14

13 Oct '14

?The Bachelier Finance Society and the Department of Mathematics of the Politecnico di Milano, in cooperation with Springer, are proud to announce the 2014 Nicola Bruti Liberati Prize (IV edition) which is to be awarded annually for a doctoral thesis in all subjects of Mathematical Finance, such as, but not limited to: Derivative Pricing, Computational Finance, Econometrics and Statistical Methods applied to Finance, Risk Analysis, Portfolio Optimization, Probability Methods in Finance, and Numerical Methods in Finance. Nicola obtained an undergraduate degree from Bocconi University (2001) in Mathematical Finance. He died in 2007 in a traffic accident in Sydney, while he was completing his PhD thesis at the University of Technology. At that time, he was also cooperating with the Quantitative Finance group of the Department of Mathematics of the Politecnico di Milano. In order to commemorate Nicola, his family and the Department of Mathematics of the Politecnico di Milano offer an annual prize of E3.000 for the best doctoral thesis to be selected by a Committee appointed by the Bachelier Finance Society. Theses defended in 2013 and 2014 must be submitted no later than January 31st, 2015. The call for scholarship can be downloaded from the QFinLab web-site (www.mate.polimi.it/qfinlab) or at the following urls [ENG] http://www.mate.polimi.it/servizi/bandi_di_concorso/upload_bandi/iizw6q/Bru… [ITA] http://www.mate.polimi.it/servizi/bandi_di_concorso/upload_bandi/iizw6q/bor…

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Seminario Sathyaa SUBRAMANIYAM (RGS & Matematica Applicata)
by Giacomo Aletti 13 Oct '14

13 Oct '14

Con preghiera di diffusione tra tutti i possibili interessati, scusandomi per invii multipli. Cordialmente, Giacomo Aletti -------------- Nell'ambito dei Reading Group Seminars e del Seminario di Matematica Applicata, il giorno lunedì 20 Ottobre 2014, alle ore 14.30, nell'Aula C del Dipartimento di Matematica dell'Universita' degli Studi di Milano, Via C. Saldini, 50, Milano, Sathyaa SUBRAMANIYAM - Department of Brain and Behavioral Science, University of Pavia, Italy - Consorzio Interuniversitario per le Scienze Fisiche della Materia (CNISM), Pavia, Italy terra' una conferenza dal titolo Detailed computation model for a cerebellar excitatory interneuron Abstract: Unipolar Brush Cells (UBCs) have been suggested to play a critical role in cerebellar functioning, yet the corresponding cellular mechanisms remain poorly understood. UBCs have recently been reported to generate, in addition to early-onset glutamate receptor-dependent synaptic responses, a late-onset response (LOR) composed of a slow depolarizing ramp followed by a spike burst (Locatelli et al., 2013). The LOR activates as a consequence of synaptic activity and involves an intracellular cascade modulating H- and TRP-current gating. In order to assess the LOR mechanisms, we have developed a UBC multi-compartmental model (including soma, dendrite, initial segment and axon) incorporating biologically realistic representations of ionic currents and a cytoplasmic coupling mechanism regulating TRP and H channel gating. The model finely reproduced UBC responses to current injection, including a burst triggered by a low-threshold spike sustained by CaLVA currents, a persistent discharge sustained by CaHVA currents, and a rebound burst following hyperpolarization sustained by H- and CaLVA-currents. Moreover, the model predicted that H- and TRP-current regulation was necessary and sufficient to generate the LOR and its dependence on the intensity and duration of mossy fiber activity. Therefore, the model showed that, using a basic set of ionic channels, UBCs generate a rich repertoire of bursts, which could effectively implement tunable delay-lines in the local microcircuit. ================= Reading Group Seminars: The Reading Group Seminars (RGS) are organized within an open community of researchers interested in applying up to date mathematical modeling and data analysis approaches to the study of biological systems. The RGS take place at the Math. Department in Milan (via Saldini). Initiatives and updates are published on the website: http://rgs.mat.unimi.it/. -- ------------------------------- Giacomo Aletti, Associate Professor ADAMSS Centre (ex MIRIAM) Advanced Applied Mathematical and Statistical Sciences Department of Mathematics (www.matematica.unimi.it) Via Saldini, 50 20133 Milano, Italy Tel: +39-02-503.16158 Fax:+39-02-503.16090 Cell: +39-340-9739142

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Daphne Jackson Fellowship
by Enrico Scalas 10 Oct '14

10 Oct '14

Car* collegh*, all'Universita' del Sussex abbiamo una posizione biennale per facilitare il reinserimento di persone che hanno dovuto sospendere l'attivita' di ricerca per un periodo prolungato (due o piu' anni). Probabilita' e statistica fanno parte delle discipline incluse nel bando. Per maggiori informazioni si puo' consultare il link seguente: http://www.sussex.ac.uk/aboutus/jobs/819 Cordiali saluti Enrico Scalas

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