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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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Fwd: PhD position available at TU Delft
by Gustavo Posta 20 Nov '14

20 Nov '14

Begin forwarded message: > From: "Faggionato, Alessandra" <faggiona(a)mat.uniroma1.it> > Subject: PhD position available at TU Delft > Date: 20 novembre 2014 10:22:52 GMT+01:00 > > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > PhD position available at TU Delft > > The PhD position is available in the Applied Probability group of Prof. Dr.= > Frank Redig at Technical University Delft. Under the supervision of Dr. W= > ioletta Ruszel and Prof. Frank Redig the PhD candidate has the opportunity = > to choose between the following challenging projects: > > - Gibbs- non Gibbs transitions on random graphs > > - Probabilistic cellular automata on trees > > - Synchronization on a network > > For more details please go to: > http://dutiosb.twi.tudelft.nl/~ruszel/misc.html > There is also the possibility to discuss possible other projects in consult= > ation with Dr. Ruszel and Prof. Redig. > You will report on your results through papers in high-ranking probability = > journals and through presentations at international conferences. > You will also have some minor teaching duties, mainly as an assistant for r= > elevant Bachelor and/or Master degree courses. > Women are especially encouraged to apply. > > Requirements > > You have an MSc in mathematics or physics, with a proven interest and track= > record in probability theory. > Conditions of employment > You will be appointed for a period of four years. Your performance will be = > evaluated after 18 months. If the evaluation is positive, the contract will= > be extended by 2.5 years; > You will be classified as a PhD Candidate (promovendus) in the Dutch univer= > sity job-ranking system (UFO). The gross starting salary amounts to 2,062 E= > uros per month based on full-time employment, and will increase to 2,638 Eu= > ros in the fourth year; > > Organisation > > TU Delft has over 13,000 students and 5,000 staff, all of whom are driven b= > y a fascination for science, design and engineering. Our university is not = > only the oldest but also the largest university of technology in the Nether= > lands. As such, we are constantly in search of new talent from home and abr= > oad to help us ensure that our research and education remains of the very h= > ighest standard. > Delft University of Technology works at providing new ground-breaking insig= > hts and solutions to urgent societal problems around the world. Thanks to i= > ts top faculty members and unique, large-scale technological research facil= > ities, this university offers world-level multidisciplinary research and ed= > ucation. > The campus contains a large number of state-of the art facilities such as t= > he sports and cultural centers. > > Contact > > The deadline fo rthe application is 31 st of December 2014. Please send a l= > etter of motivation, a list of taken courses with grades, a copy of your ma= > ster thesis and at least two references to W.M.Ruszel(a)tudelft.nl. > For more information and applications please contact W.M.Ruszel(a)tudelft.nl = > or F.H.J.Redig(a)tudelft.nl.

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Fwd: [World] Doctoral position in Combinatorics, Vienna
by Gustavo Posta 20 Nov '14

20 Nov '14

Begin forwarded message: > From: Ilse Fischer <ilse.fischer(a)univie.ac.at> > Subject: [World] Doctoral position in Combinatorics, Vienna > Date: 20 novembre 2014 09:15:54 GMT+01:00 > To: world(a)alea-research.eu > > Doctoral position in Combinatorics > University of Vienna, Austria > > A doctoral position in Combinatorics at the University of Vienna is available. The position is within the framework of a START project funded by the Austrian Science Foundation FWF and deals with recent topics in enumerative and algebraic combinatorics as wells as statistical physics. > > Successful candidates will join the combinatorics group > http://www.mat.univie.ac.at/~kratt/comb.html > > The position comes with substantial travel funding and is available from January 1, 2015 (negotiable). There is no obligation to teach. > > Applications, including CV, letter of motivation, a PDF file of the master/diploma thesis and the name of one reference with her/his email-address, should be sent to > > Ilse Fischer > ilse.fischer at univie.ac.at > http://www.mat.univie.ac.at/~ifischer/ > > and will be considered until the position is filled. > > For further informations do not hesitate to contact Ilse Fischer. > _______________________________________________ > World mailing list > World(a)alea-research.eu > http://alea-research.eu/cgi-bin/mailman/listinfo/world

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