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Seminar announcement
by Marco Scarsini 22 Mar '19

22 Mar '19

Thursday, 28 March, 12:00 Room 204 Luiss Viale Romania, 32 00197 Roma Paul Dütting, London School of Economics and Political Science Prophet inequalities for independent random variables from an unknown distribution Abstract: A central object in optimal stopping theory is the single-choice prophet inequality for independent, identically distributed random variables: Given a sequence of random variables X_1,…,X_n drawn independently from a distribution F, the goal is to choose a stopping time τ so as to maximize α such that for all distributions F we have E[X_τ] ≥ α⋅E[max_t X_t]. What makes this problem challenging is that the decision whether τ = t may only depend on the values of the random variables X_1,…,X_t and on the distribution F. For quite some time the best known bound for the problem was α ≥ 1−1/e ≈ 0.632 [Hill and Kertz, 1982]. Only recently this bound was improved by Abolhassani et al. [2017], and a tight bound of α ≈ 0.745 was obtained by Correa et al. [2017]. The case where F is unknown, such that the decision whether τ = t may depend only on the values of the first t random variables but not on F, is equally well motivated (e.g., [Azar et al., 2014]) but has received much less attention. A straightforward guarantee for this case of α ≥ 1/e ≈ 0.368 can be derived from the solution to the secretary problem. Our main result is that this bound is tight. Motivated by this impossibility result we investigate the case where the stopping time may additionally depend on a limited number of samples from F. An extension of our main result shows that even with o(n) samples α ≤ 1/e, so that the interesting case is the one with Ω(n) samples. Here we show that n samples allow for a significant improvement over the secretary problem, while O(n^2) samples are equivalent to knowledge of the distribution: specifically, with n samples α ≥ 1−1/e ≈ 0.632 and α ≤ ln(2) ≈ 0.693, and with O(n^2) samples α ≥ 0.745−ε for any ε > 0. Joint work with Jose R. Correa, Felix Fischer, and Kevin Schewior Preprint: https://arxiv.org/abs/1811.06114 The calendar of future seminars can be found at http://economiaefinanza.luiss.it/en/seminari/prossimi-seminari ******************************************************* Marco Scarsini Dipartimento di Economia e Finanza Luiss Viale Romania 32 00197 Roma, ITALY URL: http://docenti.luiss.it/scarsini/

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Mini-course announcement: Affine and polynomial processes with applications in Finance [Dept. Comp. Science - UniVr]
by Luca di persio 22 Mar '19

22 Mar '19

The Dept. of Comp. Science, College of Mathematics [ UniVr ], will host the following mini-course *Title*: Affine and polynomial processes with applications in Finance which will be given by prof. Christa Cuchiero *Abstract*: The course will be focused on the analysis of affine and polynomial processes. Particular emphasis will be given to the study of their infinite dimensional versions, which take values in (signed) measures or functions spaces. This allows to consider applications ranging from rough volatility models over non-linear PDEs, to stochastic portfolio theory. *Time table*: Monday 25/03: 9.30 -11.30 (Room G) Wednesday 27/03: 13.30-16.30 (Room M) Thursday 28/03: 12.30 - 14.30 ( Room Tessari) See also: http://www.di.univr.it/?ent=seminario&id=4703 Do not hesitate to contact me: luca.dipersio(a)univr.it for any further info. Best, LuCa __ Luca Di Persio - PhD College of Mathematics Dept. of Computer Science - University of Verona strada le Grazie 15 - 37134 Verona - Italy Tel : +39 045 802 7968 <http://www.hpa8.com/>

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Conference in Verona
by Stefania Ugolini 21 Mar '19

21 Mar '19

The Department of Mathematics of the University of Milano in collaboration with INDAM-GNAMPA, University of Trento, University of Insubria, Linneaus University, Wuppertal University organizes the following conference: RANDOM TRANSFORMATIONS AND INVARIANCE INSTOCHASTIC DYNAMICS Chapter Hall of San Giorgio in Braida’smonastery, Verona 25-29 March 2019 The study of transformations, symmetries and invariance properties of ordinary and partial differential equations, and associated conserved quantities, is a classical area of research. The inclusion of random terms in the deterministic systems has received a considerable attention only in recent years. The purpose of the conference is to allow researchers of different areas, particularly mathematical physics, probability, analysis, interact in order to reduce the gap between deterministic and stochastic frameworks. For further information see http://users.mat.unimi.it/users/ugolini/workshop2019/ On behalf of the organizing committe, Stefania Ugolini. <signaturebeforequotedtext></signaturebeforequotedtext><signatureafterquotedtext></signatureafterquotedtext>

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de Finetti risk seminar
by Emanuela Rosazza 21 Mar '19

21 Mar '19

Gentile Prof. Cambini, Le sarei grata se potesse inoltrare il seguente avviso di messaggio. La ringrazio anticipatamente e saluto cordialmente, Emanuela --- On behalf of the Scientific Committee of the de Finetti Risk Seminars, we are glad to invite you to participate at the following Lecture A mathematical model of learning reward uncertainty in the brain Rafal Bogacz Nuffield Department of Clinical Neurosciences, University of Oxford Abstract: To maximise their chances for survival, humans and animals need to base their decisions not only on the average consequences of chosen actions, but also on the variability of the rewards resulting from these actions. For example, when ones food reserves are depleted, one should prefer to forage in an area where food is guaranteed, rather than an area where the amount of food is higher on average but variable, thus avoiding the risk of starvation. To implement such policies, the brain needs to be able to learn about variability of rewards resulting from taking different actions. This talk will present a simple mathematical model describing how such learning may be implemented in the brain. The models suggests how the information about reward uncertainty is used by the brain to make decisions that not only maximize expected rewards but also take risks into account. The models is consistent with a wide range of experimental data from neuroscience. The talk will also include a discussion of the relationship between the model and the probability weighting functions from the prospect theory. LOCATION: The seminar will be held on Wednesday, March 27, at 15.00 at room 3-E4-SR03, Bocconi University, Via Rontgen 1, 3rd floor, Milano. A refreshment will be offered at 14.45. Scientific Committee: Prof. Simone Cerreia-Vioglio (Univ. Bocconi) Prof. Marco Frittelli (Univ. degli Studi di Milano) Prof. Fabio Maccheroni (Univ. Bocconi) Prof. Massimo Marinacci (Univ. Bocconi) Prof. Emanuela Rosazza Gianin (Univ. Milano-Bicocca) Dott. Marco Maggis (Univ. degli Studi di Milano) ******************************************************************************************* Emanuela Rosazza Gianin Dipartimento di Statistica e Metodi Quantitativi Università di Milano-Bicocca Edificio U7 – 4° Piano Via Bicocca degli Arcimboldi, 8 20126 Milano Tel. 02 64483208 Fax. 02 64483105 e-mail: emanuela.rosazza1(a)unimib.it *******************************************************************************************

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UCL-Rome Workshop on Stochastic and PDE Methods in Finance and Economics, 20-22 May 2019
by Germano, Guido 20 Mar '19

20 Mar '19

Cari colleghi, annuncio un workshop che si terrà alla LUISS dal 20 al 22 maggio. Cordiali saluti Guido Germano ====== UCL-Rome Workshop on Stochastic and Partial Differential Equation Methods in Finance and Economics LUISS University, Rome, Italy, 20-22 May 2019 Dipartimento di Economia e Finanza, Viale Romania 32 Comprehensive information can be found on http://www.cs.ucl.ac.uk/staff/g.germano/ucl-rome_workshop.html The aim of the workshop is to bring together researchers of University College London and of various Universities in Rome who work on different areas of stochastic and PDE methods motivated by problems in economics and finance. The intended format of the workshop is, for the experienced researchers, to give a broad perspective on an area of research, discussing also current developments and, potentially, major open problems. The afternoon of the second day will be devoted to short talks by junior participants. The workshop will start in the early afternoon of the first day and end around noon of the third day. This arrangement allows participants from outside Rome to attend the whole workshop spending only two nights in the city. Participation is free of charge and open to everyone. — Dr Guido Germano www.cs.ucl.ac.uk/staff/g.germano +44 7481 388380 Associate Professor, Department of Computer Science, University College London Programme Director and Admissions Tutor, UCL MSc Computational Finance Research Associate, Systemic Risk Centre, London School of Economics

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Fwd: Announcement: 4 PhD positions in Probability Theory in Leiden
by Francesco Caravenna 19 Mar '19

19 Mar '19

Ricevo e inoltro. > Da: "Avena, L." <l.avena(a)math.leidenuniv.nl> > Oggetto: Announcement: 4 PhD positions in Probability Theory in Leiden > Data: 19 marzo 2019 17:56:45 GMT+8 > > Dear friends and colleagues, > > We are advertising four 4-year PhD positions within our probability group in Leiden. > > Project descriptions as well as the application procedure can be found at the following link: > https://www.universiteitleiden.nl/vacatures/2019/q1/19-065-phd-positions-in… <https://www.universiteitleiden.nl/vacatures/2019/q1/19-065-phd-positions-in…> > All PhD positions are linked to the NWO Gravitation Program NETWORKS: > > www.thenetworkcenter.nl <http://www.thenetworkcenter.nl/> > > I would be grateful if you would bring this announcement to the attention of potential candidates and send it to other colleagues who might be interested. > > Best regards, > Luca

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Seminario di Paolo Di Tella a Tor Vergata
by Anna Vidotto 19 Mar '19

19 Mar '19

Dear all, I would like to announce the following talk that will be held on Friday, April 5th 2019, at 4:30 PM, in Aula D’Antoni of the Department of Mathematics, University of Rome Tor Vergata, in the framework of the activities supported by the MIUR Excellence Department Project CUP E83C18000100006. Speaker: Paolo Di Tella Title: On The Weak Representation Property in Progressively Enlarged Filtrations with an Application in Exponential Utility Maximization Abstract: In this talk we show that the weak representation property of a semimartingale $X$ with respect to a filtration $\mathbb{F}$ is preserved in the progressive enlargement $\mathbb{G}$ by a random time $\tau$ avoiding $\mathbb{F}$-stopping times and such that $\mathbb{F}$ is immersed in $\mathbb{G}$. As an application of this, we can solve an exponential utility maximization problem in the enlarged filtration $\mathbb{G}$ following the dynamical approach, based on suitable BSDEs, both over the fixed-time horizon $[0,T]$, $T>0$, and over the random-time horizon $[0,T\wedge\tau]$. Kind regards --------- Anna Vidotto PostDoc Researcher Dipartimento di Matematica Università degli Studi di Roma Tor Vergata https://sites.google.com/view/annavidotto

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Quantitative Finance at Work
by Davide Erminio Pirino 18 Mar '19

18 Mar '19

Dear all, on May 2 and 3, 2019, the Department of Economics and Finance <http://economia.uniroma2.it/en/def/> and the Master of Science in Finance and Banking <http://economia.uniroma2.it/master-science/financeandbanking> of the University of Rome Tor Vergata <http://web.uniroma2.it/home/newlang/english> will host the* third edition* of Quantitative Finance at Work a workshop on the practical use of quantitative methods in Finance. Find out more about the program, the venue and the registration form at the event website <https://www.qfinatwork.com/>. Registration *is** free but required to attend to the workshop*. It will be open until the maximum number of participants is reached. The list of the speakers and some information are attached. Looking forward to seeing you in Rome “Tor Vergata”, *The Scientific Committee* Rocco Ciciretti Stefano Herzel Davide Pirino Alessandro Ramponi Sergio Scarlatti Speakers Marialena Athanasopoulou, *European Stability Mechanism. *Andrea Consiglio, Università degli Studi di Palermo. Fabio Farabullini, *Istituto per la Vigilanza sulle Assicurazioni.* Simone Freschi, *MPS Capital Services*. Tommaso Gabbriellini, *MPS Capital Services.* Fabrizio Lillo, *Università degli Studi di Bologna*. Attilio Meucci, *ARPM*. Marcello Paris, *UniCredit. *Luca Spampinato, *Bloomberg*. Valerio Sperandeo, *Mathworks*. Michele Tumminello, Università degli Studi di Palermo. Jessica Zanetti, *Morningstar*. Venue University of Rome Tor Vergata, School of Economics, Via Columbia, 2 – 00133 Rome. Date May 2 and 3, 2019. *Web*: https://www.qfinatwork.com/

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Workshop on Random Dynamical Systems and Anomalous Dynamics, Londra 20-22 Marzo 2019
by Enrico Scalas 18 Mar '19

18 Mar '19

Car* collegh*, se siete a Londra dal 20 al 22 marzo, vi puo' interessare questo workshop che si terra' all'Imperial College organizzato da Yuzuru Sato, Rainer Klages e Jeroen Lamb: http://lml.org.uk/event/workshop-on-random-dynamical-systems-and-anomalous-… Workshop aim: This workshop brings together theoretical physicists and mathematicians working on dynamical systems and stochastic processes. An emphasis is on the recent active fields of random dynamical systems and anomalous stochastic dynamics. The former refers to chaotic dynamical systems that are coupled to noise. This combination can create novel phenomena such as anomalous diffusion, stochastic bifurcations, and varieties of noise-induced phenomena. To describe them requires a new mathematical language defining objects such as random attractors, perturbed invariant measures, bifurcations, and rare event statistics. Anomalous dynamics denotes processes whose mean square displacement, unlike that of Brownian motion, grows non-linearly in time. They exhibit non-trivial properties related to non-Gaussian probability distributions, such as power-law decay of correlations, sub- or super-diffusion and ergodicity breaking. However, the emergence of such phenomena from deterministic dynamics is poorly understood. By bridging the gap between the dynamical systems and applied stochastic processes communities we aim to advance this understanding. Cordiali saluti, Enrico Scalas

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PhD positions in MODELING AND DATA SCIENCE - University of Torino
by Elvira Di Nardo 16 Mar '19

16 Mar '19

%------------------------------------------------------------------------------% The call for admission to PhD programme in MODELING AND DATA SCIENCE - University of Torino https://dottorato-mds.campusnet.unito.it/do/home.pl (Coordinator: Prof.Laura Sacerdote) is now open. %-------------------------------------------------------------------------------% We offer up to 5 PhD positions (one is reserved to candidates with international qualifications and one is reserved to the project no.9, see below) for up to 3 years. Annual amount of the PhD scholarship is € 17.500 according to DM 40/2019. This sum is subject to separate I.N.P.S. welfare contributions. Course start date is November 1st, 2019. The official language is English. The positions are assigned to specific research projects within the following list: 1. A multi-agent system (MAS) approach to model news spreading 2. A multi-agent system (MAS) modelisation of the mobility by public transport in the City of Turin 3. Quickest detection and failure time problems for industrial data 4. Machine learning in public health 5. Time changed multivariate stochastic models: calibration and fit on financial data. 6. Computable inference for hidden Markov models with orthogonal polynomial eigenstructure 7. Parallel programming models for modern applications: AI and Big Data 8. Privacy-preserving machine learning in complex domains 9. Algorithms and techniques for analyzing vast non-specialized textual corpora in order to extract complex features relevant to conceptual history and the history of argumentation. (research project linked to the scholarship funded by Dipartimento di Filosofia e Scienze dell’Educazione – excellence Department research) This list may be updated until the deadline of Call for Admission to PhD positions. Updates will be published on https://en.unito.it/postdegree/phd/modeling-and-data-science. Application fee is €50.00 for each application submitted. Candidates with international qualifications are exempted from paying the application fee. Applications must be submitted within 16th April 2019 at 12.00 (noon) Central European local time (which is also the fee mandatory deadline). Application may be integrated with additional documentation within the deadline 16th April 2019 at 12.00 (noon) Central European local time. For more details about the research projects as well as the formal application criteria, see https://en.unito.it/postdegree/phd/modeling-and-data-science The admission procedure consists in assessment of qualifications, research project and interview. The interview will include questions on applied mathematics, statistics and computer science together with a discussion on the proposed project. The interview, after prior authorization by the Commission, can be performed telematically. Schedule with information on dates and venues of entrance examinations will be published on the websites: http://en.unito.it/research/phd/phd-programmes, starting from 9th April 2019. -- %------------------------------------------------------- Elvira Di Nardo Dept. Mathematics "G. Peano" University of Torino Via Carlo Alberto 10 10123 Torino, Italia tel. +39 0116702862 fax +39 0116702878 http://www.elviradinardo.it %------------------------------------------------------- <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…> Mail priva di virus. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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