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seminari di O. Aryasova e E. Orsingher a Pisa
by Marco Romito 04 Feb '14

04 Feb '14

Il giorno 11 febbraio 2014, presso l'aula seminari del Dipartimento di Matematica dell'Università di Pisa, si terranno i seguenti seminari: 10:30 Olga Aryasova (Institute of Geophysics, National Academy of Sciences of Ukraine): A representation for the derivative with respect to the initial data of the solution of an SDE with non-regular drift 11:30 E. Orsingher (Roma Sapienza): Random flights Tutti gli interessati sono invitati a partecipare. m. _______________________________________________ abstract Aryasova We consider a multidimensional SDE with an identity diffusion matrix and a drift vector being a bounded measurable vector field. According to [Ver81] there exists a unique strong solution to such an equation. Recently the Sobolev differentiability of the solution with respect to the initial data was proved under rather weak assumptions on the drift (c.f. [Fed13,Moh12]). If the drift coefficient is smooth the derivative can be represent as a solution of an integral equation. For non-regular drift in dimension one such a representation was obtained using the local time of the initial process (see [Ary12,Att10]). It is well known that the solution does not have a local time at a point in multidimensional situation. We obtained the representation of the derivative using the theory of continuous additive functionals developed by Dynkin [Dyn63]. This method can be considered as a generalization of the local time approach to the multidimensional case. [Ary12] O. V. Aryasova and A. Yu. Pilipenko, On properties of a flow generated by an SDE with discontinuous drift, Electron. J. Probab. 17:no. 106, 1--20, 2012. [Att10] S. Attanasio, Stochastic flows of diffeomorphisms for one-dimensional {SDE} with discontinuous drift, Electron. Commun. Probab. 15:no. 20, 213--226, 2010. [Dyn63] E. B. Dynkin, Markov Processes, Fizmatlit, Moscow, 1963. [Translated from the Russian to the English by J. Fabius, V. Greenberg, A. Maitra, and G. Majone. Academic Press, New York; Springer, Berlin, 1965. vol. 1, xii + 365 pp.; vol. 2, viii + 274 pp.]. [Fed13] E. Fedrizzi and F. Flandoli, Hölder flow and differentiability for {SDE}s with nonregular drift, Stochastic Analysis and Applications, 31(4):708--736, 2013. [Moh12] S. E. A. Mohammed, T. Nilssen, and F. Proske, Sobolev differentiable stochastic flows of SDE's with measurable drift and applications, arXiv:1204.3867. [Ver81] A. Y. Veretennikov, On strong solutions and explicit formulas for solutions of stochastic integral equations, Math. USSR Sborn, 39(3):387--403, 1981. _______________________________________________ abstract Orsingher In this talk we present different types of random flights and examine their dynamics, probability laws and governing equations. We first consider the telegraph process (a random flight on the line), discuss its distribution, the connections with the telegraph equations, the first-passage time and the limiting case. We consider also the asymmetric telegraph process and its reduction to the symmetric one by means of relativistic transformations. Planar motions with a finite number of directions (in particular, four orthogonal directions) and an infinite number of directions, chosen at Poisson times with uniform law, are examined and several explicit distributions derived. A particular attention is devoted to the second model, where conditional and unconditional distributions are presented and the related equation of damped planar vibrations probabilistically derived. Random flights in R^d are subsequently considered and characteristic functions of the position of moving particles performing the random flights, obtained. The cases d = 2, d = 4, are investigated in detail. We present random flights in R^d with Dirichlet joint distribution for displacements, hyper-spherical uniform law for the orientation of steps and with a fractional Poisson number of changes of direction. Two types of fractional extensions of the above material are presented. The first one is obtained by considering Dzerbayshan-Caputo types of time- fractional derivatives. The second fractional extension is obtained by considering fractionalisation of Klein-Gordon equations and by applying the McBride approach to fractional powers of Bessel-type operators.

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Mini corso "Interest Rates Modelling", SNS Pisa
by Giacomo Bormetti 04 Feb '14

04 Feb '14

Il giorno venerdì 21 Febbraio presso la Scuola Normale Superiore, Andrea Pallavicini (Banca IMI, Imperial College) terrà un mini-corso dal titolo "Interest-Rates Modelling in Collateralized Markets with Multiple Yield Curves". Segue il programma: Aula Fermi (Palazzo della Carovana), 10:00 – 12:00 The Money Market: central bank and interbank market reference rates The Credit Crunch and the Raising of the Basis Aula Dini (Palazzo Castelletto), 14:00 – 16:00 Pricing in Collateralized Markets: discounting and forwarding curves The HJM Framework: single-curve and multiple-curve modeling Tutti gli interessati sono invitati a partecipare. Saluti, Giacomo

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risk and stochastics conference 2014, LSE (fwd)
by Tiziano Vargiolu 04 Feb '14

04 Feb '14

---------- Forwarded message ---------- Date: Mon, 3 Feb 2014 21:12:10 +0000 From: L.Campi(a)lse.ac.uk To: vargiolu(a)math.unipd.it Subject: risk and stochastics conference 2014, LSE Dear All On behalf of the organising committee, I invite you to the LSE Risk and Stochastics Conference 2014. The conference will take place on Thursday 24 and Friday 25 April 2014 in lecture theatre EAS.E171 in the East Building. This year?s speakers are: Beatrice Acciaio (LSE) Mathias Beiglb?ck (University of Vienna) Bruno Bouchard (University Paris Dauphine) Jaksa Cvitanic (Caltech) Chrsistoph Czichowsky (LSE) Stefano De Marco (?cole Polytechnique) Vladimir Kaishev (Cass Business School) Goran Peskir (University of Manchester) Philip Protter (Columbia University) Halil Mete Soner (ETH Z?rich) Conference website homepage: http://www.lse.ac.uk/statistics/events/SpecialEventsandConferences/Risk-and… Conference website programme and abstracts: http://www.lse.ac.uk/statistics/events/SpecialEventsandConferences/Risk-and… If you would like to attend, please register at: http://eshop.lse.ac.uk/browse/extra_info.asp?compid=1&modid=2&deptid=221&ca… The event is free for everyone, but registration is essential. Registration via LSE eShop is preferred, but I will accept bookings from LSE students by email if it is more convenient. With kindest regards Luciano Campi Associate Professor Department of Statistics, LSE Please access the attached hyperlink for an important electronic communications disclaimer: http://lse.ac.uk/emailDisclaimer

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Fwd: Fwd: A new professorship on Insurance Mathematics at the University of Ulm (fwd)
by Tiziano Vargiolu 03 Feb '14

03 Feb '14

-------- Messaggio originale -------- Oggetto: A new professorship on Insurance Mathematics at the University of U lm Da: An Chen <an.chen(a)uni-ulm.de> A: An Chen <an.chen(a)uni-ulm.de> CC: Dear colleague, first of all, a late happy new year! I wish all of you a very successful and joyful 2014! Our faculty will post a new permanent professorship (W3) on "Insurance Mathematics". Enclosed please find the detailed descriptions about the position. If you know some one who might be interested in such a positon, please spread the news for me. Many thanks! Best regards, An -- Prof. Dr. An Chen Institute of Insurance Science Faculty of Mathematics and Economics University of Ulm Helmholtzstrasse 20 89069 Ulm Germany Tel: 0049-731-5031183 Fax: 0049-731-5031188 Website: http://www.uni-ulm.de/mawi/ivw/team/

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Avviso di seminario :: Macci@DSS (Scienze Statistiche, Sapienza)
by Pierpaolo Brutti 03 Feb '14

03 Feb '14

----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Venerdì 7 Febbraio, ore 11am ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma CLAUDIO MACCI (Dip. di Matematica, Università di Roma Tor Vergata) terrà un seminario dal titolo ASYMPTOTIC RESULTS FOR EMPIRICAL MEANS OF INDEPENDENT GEOMETRIC DISTRIBUTED RANDOM VARIABLES tutti gli interessati sono invitati a partecipare. ----------------------------------------------------------------------------- Maggiori informazioni sui seminari presso il DSS sono consultabili a quest'indirizzo: http://goo.gl/Y6OQYm Saluti Pierpaolo Brutti - Fulvio De Santis --- Summary We consider independent geometric distributed random variables which satisfy suitable hypotheses. We study large and moderate deviations for their empirical means, and we illustrate applications of the large deviation results for the weak record values of i.i.d. discrete random variables. Joint work with Barbara Pacchiarotti.

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Fwd: Young Women in Probability
by Mario MAURELLI 02 Feb '14

02 Feb '14

Dear all, I apologize for those who are not interested and for cross-posting. I forward this announcement, received by a friend in Bonn, on the workshop "Young women in probability". Below you find more details. Best regards Mario Maurelli PhD student Scuola Normale Superiore, Pisa On Sat, 01 Feb 2014 09:08:13 +0100 Carina Geldhauser <geldhauser(a)iam.uni-bonn.de> wrote: >ciao Mario, > >Vorrei pubblicizzare la conferenza "Young Women in Probability", organizzata dai miei colleghi a Bonn. >Ti mando l'annuncio, se lo potessi inoltrare ai tuoi compagni, mi farebbe piacere. > >a presto! >Carina > > > > >******** > > >YOUNG WOMEN IN PROBABILITY 2014 > >Dates : Monday 26th - Wednesday 28th May 2014 > >Place : University of Bonn > >Description : The aim of this workshop is to provide a platform for young female researchers in Probability (PhD students and postdocs), to present their work in an environment which can cultivate collaborations. > >Plenary speakers : >N. Gantert, TU München, Germany >B. de Tilière, Paris 6, France >A. Winter, Universität Duisburg-Essen, Germany > >We invite young female researchers to submit abstracts for contributed talks by March 15. >Financial support is available. > >For further information please visit : >http://www.iam.uni-bonn.de/ywip2014/ > >Organizers : >Loren Coquille, Janna Lierl > >Contact address: ywip2014(a)iam.uni-bonn.de > > >-- >Carina Geldhauser >Institute for Applied Mathematics >Bonn University >Endenicher Allee 60, 53115 Bonn >phone: +49 (0)228 73 3190 >web: http://wt.iam.uni-bonn.de/geldhauser >

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Fwd: IHP TRIMESTER : Disordered systems, random spatial processes and some applications/ Systèmes désordonnés, processus spatiaux aléatoires et certaines applications
by Cristian Giardina 01 Feb '14

01 Feb '14

---------- Forwarded message ---------- From: random15 <random15(a)ihp.fr> Date: Thu, Jan 30, 2014 at 1:46 PM Subject: IHP TRIMESTER : Disordered systems, random spatial processes and some applications/ Systèmes désordonnés, processus spatiaux aléatoires et certaines applications To: Cristian Giardina <cristian.giardina(a)unimore.it> Dear Colleague, It is our pleasure to announce a programme on "Disordered systems, random spatial processes and some applications" organized by the Emile Borel Centre from the Henri Poincare Institute in Paris from January 5th to April 3rd, 2015. Organizers: J-P. Bouchaud, P. Contucci, C. Giardina, P. Nolin, V. Sidoravicius, V. Vargas Information on the programme can be found on: www.ihp.fr/en/CEB/T1-2015 or *random15.dm.unibo.it/ <http://random15.dm.unibo.it/>* * Registration is free and recommended* *to participate to:* - the trimester + workshops on: www.ihp.fr/en/program/13698/colloques/register - workshop(s) only on: www.ihp.fr/en/program/13698/colloques/register/nosignupprogram *BE CAREFUL:* *Deadline to apply for financial support is June 2nd**, 2014.* At the beginning of the programme a one week pre school will take place at the CIRM Marseille "Introductory school at CIRM" and 3 workshops will be organized during the trimester: Statistical physics methods in social and economic systems Spin glasses, random graphs and percolation Interacting particles systems and non-equilibrium dynamics We are looking forward to welcoming you! PS: do not hesitate to forward this email to your colleagues. **************************************************** Cher Collegue, Nous avons le plaisir de vous annoncer l organisation d un programme sur les " Systemes desordonnes, processus spatiaux aleatoires et certaines applications" au Centre Emile Borel de l Institut Henri Poincare a Paris, du 5 janvier au 3 avril 2015. Les organisateurs: J-P. Bouchaud, P. Contucci, C. Giardina, P. Nolin, V. Sidoravicius, V. Vargas Vous pouvez consulter le programme a l adresse suivante: www.ihp.fr/fr/CEB/T1-2015 ou directement a cette adresse: *random15.dm.unibo.it/ <http://random15.dm.unibo.it/>* *L inscription au programme est gratuite et recommandee **sur l adresse suivante:* - pour le trimestre + conferences: www.ihp.fr/fr/program/13698/colloques/register - ou uniquement pour le/les conferences: www.ihp.fr/fr/program/13698/colloques/register/nosignupprogram *Attention:* *Date limite pour les supports financiers: 2 juin 2014* Le trimestre debutera par une pre ecole d une semaine au CIRM de Marseille. Pendant ce trimestre, 3 conferences seront organisees: Statistical physics methods in social and economic systems Spin glasses, random graphs and percolation Interacting particles systems and non-equilibrium dynamics C est avec plaisir que nous vous accueillerons a Paris. PS: merci par avance de bien vouloir transmettre ce courriel a vos collegues. -- Claire Berenger Organisation Assistant random15(a)ihp.fr CNRS UPMC - Institut Henri Poincare Centre Emile Borel 11, rue Pierre et Marie Curie - 75005 Paris Bureau 206 Tel: 01 44 27 67 64 Fax: 01 44 07 09 37www.ihp.fr Decouvrez la chaine de l'institut Henri Poincare<http://www.youtube.com/user/PoincareInstitute> <http://www.youtube.com/user/PoincareInstitute>.

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Avviso di Seminario -- Dott. Robert Knobloch
by Federico Polito 31 Jan '14

31 Jan '14

****************************************************** SEMINARI DI PROBABILITA' E STATISTICA DIPARTIMENTO DI MATEMATICA G. PEANO UNIVERSITA' DEGLI STUDI DI TORINO ****************************************************** Lunedì 10 Febbraio alle ore 15 in Aula S presso il Dipartimento di Matematica "G. Peano" dell'Università degli Studi di Torino, Via Carlo Alberto 10, il Dott. ROBERT KNOBLOCH (Department of Mathematics -- Saarland University) terrà un seminario dal titolo "An Itō type formula and related properties for convoluted Lévy processes" Abstract: In this talk we derive moment and path properties as well as an Itō type formula for a large class of convoluted Lévy processes M(t) that in particular contains fractional Lévy processes. To this end we make use of the S-transform, which is defined as the expectation under a suitable change of measure and results in Hitsuda-Skorokhod integrals appearing in our main results. For the general version of our Itō type formula we assume that the underlying Lévy process has a nontrivial Gaussian component and use this assumption to prove that the characteristic function of M(t), under the aforementioned changed measure, has nice integrability properties. This enables us to weaken the conditions in the Itō type formula compared to related results in the literature. Tutti gli interessati sono invitati a partecipare. Federico Polito -- Department of Mathematics University of Torino Via Carlo Alberto, 10 10123, Torino, Italy

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Fwd: Workshop "Teorie Matematiche della Crisi"
by marina pireddu 30 Jan '14

30 Jan '14

Cari Colleghi, vi segnaliamo il workshop "Teorie Matematiche della Crisi" che si terrà in Bicocca i prossimi 6 e 7 Febbraio. Trovate il programma in allegato. Tutti gli interessati sono invitati a partecipare. Un caro saluto, Marina Pireddu ed Ahmad Naimzada

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PhD position with deadline tomorrow
by Camilla Pisani 30 Jan '14

30 Jan '14

PhD position in Lund with deadline tomorrow: http://www.lunduniversity.lu.se/o.o.i.s?id=24914&Dnr=575675&Type=E _____________________ Camilla Pisani HPCFinance project-Phd student Aarhus University Business and Social Sciences Fuglesangs Allé 4 8210 Aarhus V, Denmark T: +45 87166015 M: cpisani(a)econ.au.dk W: http://au.dk/en/ cpisani(a)econ.au.dk [bslogo_mail_equis_stor_uk] Business and Social Sciences is a broad business school constituting one of four new main academic areas at Aarhus University. Business and Social Sciences is the largest university unit within business and social sciences in Denmark, encompassing a wide range of academic disciplines, outstanding research environments and strong degree programmes.

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