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Position in Pisa (fwd)
by Tiziano Vargiolu 27 Nov '14

27 Nov '14

---------- Forwarded message ---------- Date: Thu, 27 Nov 2014 14:38:52 +0100 (CET) From: Giovanna Carnovale <carnoval(a)math.unipd.it> To: users(a)math.unipd.it =========================================================================== POSTDOC POSITION AT CENTRO DI GIORGI - PISA This is a 2 year position. Gross compensation, inclusive of all taxes: ? 65.000 (for 2 years) The "Centro De Giorgi" is in front of Scuola Normale Superiore and 500 meters from the Department of mathematics. http://www.sns.it/en/servizi/job/assegnidiricerca/assegno559/ ==============================================================================

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Wednesday 3.12.14 14.30h ASSESSING RISKS: ISSUES AND SOLUTIONS - R. Zitikis University of Western Ontario
by Francesca Greselin 27 Nov '14

27 Nov '14

Con preghiera di diffusione tra tutti i possibili interessati, scusandomi per invii multipli. Cordialmente, Francesca Greselin ----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Wednesday December, 3 2014, at 2.30 p.m Department of Statistics and Quantitative Methods Aula Consiglio della Scuola di Economia e Statistica, 4rth floor, Room n°4064, building U7 ----------------------------------------------------------------------------- RICARDAS ZITIKIS, PhD, (Department of Statistical and Actuarial Sciences, University of Western Ontario, London, Canada) will give the following talk: ASSESSING RISKS: ISSUES AND SOLUTIONS Abstract Just like measuring economic inequality, assessing risk and its impact on decision making could be a daunting task. More often than not, we misestimate risk, and do so unwittingly. I will illustrate such issues and share thoughts that have guided my current research. http://www.stats.uwo.ca/faculty/zitikis/main.htm <http://www.stats.uwo.ca/faculty/zitikis/main.htm> -----------------------------------------------------------------------------

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seminario di Tiziano Vargiolu presso Prometeia - Bologna
by Giacomo Scandolo 25 Nov '14

25 Nov '14

Il giorno Martedì 2 Dicembre 2014, alle ore 14:30 presso la sede di Prometeia (sala grande, primo piano) via G.Marconi 43, Bologna Tiziano VARGIOLU (Università di Padova) terrà un seminario dal titolo "Utility indifference pricing and hedging for structured contracts in energy markets" Abstract In this paper we focus on pricing of structured products in energy markets using utility indifference pricing approach. In particular, we compute the buyer's price of such derivatives for an agent investing in the forward market, whose preferences are described by an exponential utility function. Such a price is characterized in terms of continuous viscosity solutions of suitable non-linear PDEs. This provides an effective way to compute both an optimal exercise strategy for the structured product and a portfolio strategy to partially hedge the financial position. In the complete market case, the financial hedge turns out to be perfect and the PDE reduces to particular cases already treated in the literature. Moreover, in a model with two assets and constant correlation, we obtain a representation of the price as the value function of an auxiliary simpler optimization problem under a risk neutral probability, that can be viewed as a perturbation of the minimal entropy martingale measure. Finally, numerical results are provided.

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Seminario Ely MERZBACH (Fractional Poisson Process)
by Giacomo Aletti 25 Nov '14

25 Nov '14

Con preghiera di diffusione tra tutti i possibili interessati, scusandomi per invii multipli. Cordialmente, Giacomo Aletti -------------- Nell'ambito del Seminario di Matematica Applicata, il giorno giovedì 4 Dicembre 2014, alle ore 16.00, nell'Aula 4 (piano terra) del Dipartimento di Matematica dell'Universita' degli Studi di Milano, Via C. Saldini, 50, Milano, "The Fractional Poisson process and extensions" Ely MERZBACH Bar Ilan University (joint work with O. Busani and N. Leonenko) Abstract: We present different definitions and asymptotic properties of the Fractional Poisson Process. We define Continuous Time Random Walks Limits. Using inverse stable subordinators and Mittag-Leffler functions, we present a new definition of a fractional Poisson process parametrized by points of the Euclidean plane. Some properties are given and, in particular, we prove a long-range dependence property. -- ------------------------------- 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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Seminario VIDYASHANKAR
by Andrea Ghiglietti 24 Nov '14

24 Nov '14

Con preghiera di diffusione tra tutti i possibili interessati,scusandomi per invii multipli.Cordialmente,Andrea Ghiglietti--------------Annuncio il seguente seminario:il giorno giovedì 4 Dicembre 2014, alle ore 14.30, nell'Aula 4 del Dipartimento di Matematica dell'Università degli Studi di Milano, Via C. Saldini, 50, Milano,"Finite Sample Post-Model Selection Inference"Anand N. Vidyashankar,Department of Statistics, Volgeneau School of Engineering, George Mason University.Abstract:In several instances of statistical practice it is common, when using parametric or semi-parametric models, that a preliminary test of a subset of parameters is made and based on the results of the pretest an appropriate model is chosen. However, when evaluating the resulting inferential procedure the variability induced by the model-selection needs to be taken into account. In this presentation, we describe two distinct approaches to data analyses in these contexts. We evaluate both these approaches, using recently developed concentration inequalities, in nite samples as opposed to the traditional large sample investigations. We also describe new central limit theorems facilitating comparisons between the methods. Keywords: Finite Sample Inference, Model Selection Variability, Asymptotic inference, Data-splitting, Large deviations, Concentration Inequalities.

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Seminario CHARAWI (RGS & Matematica Applicata)
by Giacomo Aletti 24 Nov '14

24 Nov '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 1 Dicembre 2014, alle ore 14.30, nell'Aula C del Dipartimento di Matematica dell'Universita' degli Studi di Milano, Via C. Saldini, 50, Milano, "Ionic mechanism underlying cardiac pacemaking: Insights from a mathematical model" Lara CHARAWI Dipartimento Matematica, Università di PAVIA Abstract: The ionic mechanisms at the basis of the spontaneous pacemaker activity of sinoatrial node (SAN) cells is a matter of intense debate [1], in particular the role of the hyperpolarization-activated current, known as the "funny" current If [2]. Computational models of the electrical activity of SAN cells have been proposed to gain a deeper understanding of the phenomenon, however they fail in reproducing experimental effects of If modifications. We present a novel mathematical model of rabbit SAN action potential [3], developed by updating the description of membrane currents and intracellular mechanisms on the basis of experimental acquisitions, in an attempt to reproduce pacemaker activity and its physiological and pharmacological modulation. Our model describes satisfactorily experimental data on pacemaking regulation due to neural modulation, If block and inhibition of the intracellular calcium handling. Simulation results suggest that a detailed description of the intracellular calcium fluxes is fully compatible with the observation that If is a major component of pacemaking and rate modulation. Keywords Cardiac modelling, cardiac pacemaking, sinoatrial node, funny current, autonomic rate modulation. References [1] Lakatta, E. G., and DiFrancesco, D. (2009). What keeps us ticking: a funny current, a calcium clock, or both?. J. mol. cell. cardiol., 47(2), 157-170. [2] Brown, H. F., DiFrancesco, D., and Noble, S. J. (1979). How does adrenaline accelerate the heart? Nature, 280, 235-236. [3] Severi, S., Fantini, M., Charawi, L. A., and DiFrancesco, D. (2012). An updated computational model of rabbit sinoatrial action potential to investigate the mechanisms of heart rate modulation. J. physiol., 590(18), 4483-4499. ================= 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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Seminario Prof. Mascia (presso Dip. Scienze Statistiche, Roma)
by Alessandro Degregorio 21 Nov '14

21 Nov '14

----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Venerdì 28 Novembre, ore 10 ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma PROF. CORRADO MASCIA (Dipartimento di Matematica "G. Castelnuovo", Sapienza Università di Roma) terrà un seminario dal titolo: *Parabolic behavior of hyperbolic systems describing velocity-jump processes* *Abstract:* *The talk concerns with the large-time behavior of a class of* *hyperbolic systems of partial differential equations and its relation* *with corresponding (reduced) parabolic equations. The basic prototypeis the Goldstein-Kac model for correlated random walks, interpreted asa variation of the classical heat equation.Areas of interest of the topic will be presented, together with aselection of known rigorous mathematical results available in theliterature. Additionally, the asymptotic description of ageneralization of the Goldstein-Kac model to an arbitrary number ofspeeds in several dimensions (based on an application of a variant ofthe Kirchoff’s matrix tree Theorem from graph theory) will bepresented in details.* Tutti gli interessati sono invitati a partecipare. Saluti Alessandro De Gregorio

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seminario TOM HURD
by Matteo Burzoni 21 Nov '14

21 Nov '14

Avviso di seminario. Università degli studi di Milano. --------------------------------------------------------------------------------------------- Venerdì 28 Novembre 2014 alle ore 14.00 presso l’Aula di Rappresentanza del Dipartimento di Matematica, Via Saldini, 50, Milano -------------------------------------------------------------------------------------------- Tom Hurd Mc Master University terrà un seminario dal titolo: Percolation and Financial Cascades Abstract: Exact results in percolation theory on random graphs rely on a property known as the ``tree ansatz'', which is known to be asymptotically true on the family of configuration graphs. The question arises whether percolation ideas are relevant l for understanding systemic risk in financial networks. In this talk, I will review models of financial contagion, such as the Eisenberg-Noe model and its alternatives. Along the way, I will propose definitions for ``random financial network'' (RFN) and ``locally treelike independence'' (LTI), and explore these definitions' mathematical consequences. In the end, comparison of analytical approximations to Monte Carlo computations in some realistic network cascade examples shows that there are indeed situations where the LTI approximation is "surprisingly" accurate.

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Job Openings in Research Positions (Female) at ISM, Japan
by Ilia Negri 21 Nov '14

21 Nov '14

Volentieri giro questa informazione di una posizione per ricercatrice (donna) presso l'ISM a Tachikawa, Tokyo. The institute of Statistical Mathematics (ISM), Tachikawa, Tokyo (Japan) has an open position for Assistant Professor in Statistics (female) Deadline for Application : Must be submitted by December 12, 2014 More informations are available here: http://www.ism.ac.jp/jobs/index_e.html or here: http://www.ism.ac.jp/jobs/index_e/1111.pdf Ilia Negri http://www.unibg.it/pers/?ilia.negri

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Seminario MICHAEL HINZ -- UniTo
by Federico Polito 20 Nov '14

20 Nov '14

****************************************************** SEMINARI DI PROBABILITA' E STATISTICA DIPARTIMENTO DI MATEMATICA G. PEANO UNIVERSITA' DEGLI STUDI DI TORINO ****************************************************** Venerdì 28 Novembre 2014 alle ore 14:00 in Aula S presso il Dipartimento di Matematica "G. Peano" dell'Università degli Studi di Torino, Via Carlo Alberto 10, Il Dott. MICHAEL HINZ (Department of Mathematics, Bielefeld University) terrà un seminario dal titolo CALCULUS, STOCHASTIC PROCESSES AND GEOMETRY WITHOUT SMOOTHNESS Abstract: The talk deals with analysis and stochastic processes on fully singular spaces (i.e. singular at every or almost every point). In the first part we give a brief introduction to the subject which was started in the late eighties and early nineties by Goldstein, Kusuoka, Barlow, Bass, Kigami and others and is now referred to as 'Analysis on fractals'. Markov processes and their energy functionals (Dirichlet forms) play a key role. In the second part we explain some interrelations between stochastic analysis and items of differential geometry, point out some recent results and applications. Tutti gli interessati sono invitati a partecipare. -- Federico Polito Department of Mathematics University of Torino Via Carlo Alberto, 10 10123, Torino, Italy Email: federico.polito(a)unito.it Tel: +39 011 6702937 Web: www.federicopolito.it

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