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Seminar by Dr. Andrea Modena.
by Giorgio Rizzini 05 Nov '24

05 Nov '24

Dear all, as part of the Quantitative Finance Seminars, Dr. Andrea Modena (University of Mannheim) will give a seminar entitled "Coordinating Dividends and Capital Regulation" (joint work with Luca Regis and Salvatore Federico) on November 11th at 11 am in Aula Fermi at Scuola Normale Superiore in Pisa.The seminar can also be followed online by sending an email to giorgio.rizzini(a)sns.it. Best regards, Giorgio Rizzini *Abstract: * We develop a tractable dynamic corporate finance model to analyze the effects of state-contingent dividend restrictions and capital requirements on firm optimal policies and value. In the model, a risk-neutral shareholder manages a firm that generates stochastic income under time-varying macroeconomic conditions. The manager maximizes shareholder value by paying dividends, holding reserves, and issuing costly equity without agency conflicts. We analytically solve the firm's stochastic control problem and derive its reserve distribution in closed form. The model predicts that restricting dividends in "bad" macroeconomic states—characterized by lower and more volatile cash flows— reduces shareholder value but can effectively sustain the firm's credit capacity. The policy, however, curtails the firm's recapitalization incentives and credit capacity in "good" states. Coordinating dividends with counter-cyclical capital regulation can mitigate value losses but negatively impacts recapitalization incentives further.

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Fwd: Post-doc advert Cambridge
by Laura Maria Sangalli 05 Nov '24

05 Nov '24

Ricevo ed inoltro l’annuncio di una posizione di post-doc presso l’Università di Cambridge, sotto la supervisione del Prof Richard Samworth. Cordialmente, Laura Sangalli —— Laura Maria Sangalli MOX - Dipartimento di Matematica Politecnico di Milano Piazza Leonardo da Vinci 32 20133 Milano - Italy (+39) 02 2399 4554 laura.sangalli(a)polimi.it<mailto:laura.sangalli@polimi.it> https://sangalli.faculty.polimi.it Inizio messaggio inoltrato: Da: Richard Samworth <rjs57(a)cam.ac.uk<mailto:rjs57@cam.ac.uk>> Oggetto: Post-doc advert Data: 3 novembre 2024, 11:11:40 CET A: Laura Maria Sangalli <laura.sangalli(a)polimi.it<mailto:laura.sangalli@polimi.it>> Hi Laura, Sorry for the formal message! I'm writing because I'm currently advertising for a post-doc position: https://www.jobs.cam.ac.uk/job/48646/ The closing date is 10 December. Please could you bring the advert to the attention of anyone who you think may be interested? Many thanks and best wishes Richard

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Seminario PRISMA oggi
by Francesco Caravenna 05 Nov '24

05 Nov '24

Seminari on-line del gruppo UMI - PRISMA (http://www.umi-prisma.polito.it/) Ricordiamo che oggi, martedì 5 novembre 2024, Enzo Orsingher (Sapienza Università di Roma) e Wolfgang Woess (Technische Universitaet Graz) ci parleranno di Il moto browniano iperbolico e le sue ramificazioni con il seguente orario: 16:00 Primo seminario 16:30 Pausa e discussione 16:45 Secondo seminario 17:15 Conclusione e discussione Trovate di seguito il riassunto. I seminari verranno trasmessi via Zoom al seguente link: https://uniroma1.zoom.us/j/88679569146 Meeting ID: 886 7956 9146 Vi aspettiamo numerosi! Valentina Cammarota e Francesco Caravenna %%%%%%%%%%%%%%%%%%%%%%%%%%%% RELATORI: Enzo Orsingher (Sapienza Università di Roma) e Wolfgang Woess (Technische Universitaet Graz) TITOLO: Il moto browniano iperbolico e le sue ramificazioni RIASSUNTO: Il moto browniano ramificato (branching Brownian motion - BBM) in ambito euclideo è stato studiato intensamente durante molti decenni da studiosi rinomati. Il BBM sul disco (ossia semipiano) iperbolico ha ricevuto molta meno attenzione. Un lavoro profondo di Lalley and Sellke (1997) ha messo in luce la fase ricorrente, risp. transitoria del BBM sul disco di Poincaré. In particolare, Lalley e Sellke hanno determinato la dimensione di Hausdorff dell'insieme limite sulla frontiera (il cerchio unitario) in funzione del tasso di ramificazione delle particelle. Nel primo dei due seminari viene introdotta la geometria del disco iperbolico con la metrica di Poincaré e del modello equivalente del semipiano superiore. Si presenta il Laplaciano iperbolico, cioè l'operatore di Laplace-Beltrami associato a questa superficie. Esso è l'operatore infinitesimale del moto browniano iperbolico. Si presentano alcune proprietà chiave di questo processo. Nel secondo seminario si introduce il moto browniano ramificato iperbolico. Vengono presentati alcuni nuovi risultati. In particolare, si forniscono i tassi della massima e minima distanza iperbolica della popolazione al tempo t dal punto di partenza e delle stime asintotiche più precise nella fase transitoria. L'altro tema principale riguarda il comportamento delle distribuzioni empiriche della popolazione ramificante e la loro convergenza a una distribuzione limite aleatoria sulla frontiera di supporto infinito. %%%%%%%%%%%%%%%%%%%%%%%%%%%% I seminari PRISMA hanno un formato di "colloquium" per creare un'occasione di scambio e discussione con tutta la comunità dei probabilisti e statistici italiani. Ogni giornata comprende due relatori che tengono due seminari di 30 minuti strettamente connessi, per presentare alla comunità una prospettiva sul proprio ambito di ricerca. Da quest'anno le registrazioni dei seminari vengono pubblicate sul canale YouTube dell'UMI: https://youtube.com/playlist?list=PLmySpc-jrtAMq84VH71evyqPc1hl6eEQb %%%%%%%%%%%%%%%%%%%%%%%%%%%%

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Seminario Pablo Groisman, Lunedì 11 Novembre, Sapienza Università di Roma
by Silvestri, Vittoria 04 Nov '24

04 Nov '24

Segnalo il seguente seminario, che si terrà Lunedì prossimo in Sapienza. *Lunedì 11 Novembre, ore 14:00,* Aula B, Dipartimento di Matematica, Sapienza Università di Roma *Speaker:* Pablo Groisman (University of Buenos Aires) *Title: *The Kuramoto Model in Random Geometric Graphs *Abstract: *The Kuramoto model is a nonlinear system of ODEs that represents the behavior of coupled oscillators. The coupling is determined by a given graph and pushes the system towards synchronization. An important question is whether there is global synchronization (the system converges to a state in which all the phases coincide from almost every initial condition) or if the system supports other patterns. We will consider the Kuramoto model on random geometric graphs in the d dimensional torus and prove a scaling limit. The limiting object is given by the heat equation. On the one hand this shows that the nonlinearities of the system disappear under this scaling and on the other hand, provides evidence that stable equilibria of the Kuramoto model on these graphs are, as n → ∞, in correspondence with those of the heat equation, which are explicit and given by twisted states. In view of this, we conjecture the existence of twisted stable equilibria with high probability as n → ∞. We'll prove this conjecture in dimension d=1. ******************************** Vittoria Silvestri Assistant Professor Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome ********************************

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master / doctoral / post-doctoral scholarships in Paris
by CRISTINA TONINELLI 04 Nov '24

04 Nov '24

Ricevo e inoltro, cari saluti Cristina ----- Dear colleagues, The Fondation Sciences Mathématiques de Paris supports research and training in Mathematics and in fundamental Computer Science through its various programs: research chairs of excellence, postdoctoral positions, doctoral allowances, master scholarships. The positions are mainly located in Paris or in Paris area. For academic year 2025-2026, see schedule of deadlines below (at 11:59 p.m., Paris time). Feel free to circulate this message to your contacts. Paris Graduate School for Mathematical Sciences (master scholarships): Call (open to international students): from Monday November 4th 2024 to Thursday February 6th 2025 Offer description: https://sciencesmaths-paris.fr/en/pgsm-master FSMP Postdoctoral program: from Tuesday October 1st to Friday November 29th 2024 Offer description: https://www.sciencesmaths-paris.fr/en/postdoc-fsmp MathPhDInFrance (doctoral program): from Tuesday December 17th 2024 to Friday February 14th 2025 Offer description: https://mathphdinfrance.fr/ Research Chairs of excellence: from Tuesday October 1st to Friday November 29th 2024 Offer description: https://sciencesmaths-paris.fr/en/nos-programmes-en/les-chaires-fsmp ------- --------------------------------------------------------------------------------------------- Cristina Toninelli Postal Address: Ceremade Univ.Paris Dauphine Place du Marechal de Lattre de Tassigny 75775 Paris Cedex 16 - France Office: P207bis --------------------------------------------------------------------------------------------

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Research Associate in Bayesian Statistics, Newcastle University
by Fabrizio Leisen 04 Nov '24

04 Nov '24

Apologies for cross posting. Con preghiera di diffusione. Il candidato ideale deve avere della solide basi in inferenza Bayesiana da un punto di vista statistico piuttosto che Machine Learning. Cordiali Saluti, Fabrizio Leisen Professor of Statistics Head of the Statistics Group King’s College London Department of Mathematics Strand | WC2R 2LS | London ---------- Forwarded message --------- Da: Kevin Wilson <0000c562ec979ac8-dmarc-request(a)jiscmail.ac.uk> Date: mer 30 ott 2024 alle ore 14:41 Subject: JOB: Research Associate in Bayesian Statistics, Newcastle University To: <allstat(a)jiscmail.ac.uk> JOB: Research Associate in Bayesian Statistics School of Mathematics, Statistics and Physics, Newcastle University Full advert: Research Associate in Bayesian Statistics Job Details | Newcastle University< https://jobs.ncl.ac.uk/job/Newcastle-Research-Associate-in-Bayesian-Statist… > Applications are invited for a Research Associate position in Bayesian Statistics, for a period of 24 months. The project is at the forefront of Bayesian inference and aims to design a novel Bayesian methodology to implement Bayesian Additive Regression Trees (BART) models to deal with non-linear phenomena. In particular, the aim is to bridge the Loss-based methodology to the framework of BART, building on the previous works of Prof Cristiano Villa and Prof Fabrizio Leisen on model selection, linear regression models and Gaussian graphical models. The successful candidate will work on developing prior distributions to estimate the structure of the trees and the number of trees in a BART model, and building scalable and efficient computational tools to ease the implementation of the methodology. The candidate must have a solid background in computational methods for Bayesian inference to develop efficient algorithms for the new proposed modelling framework. Within the project, the candidate will also perform theoretical modelling and data analysis, as well as disseminate the outputs through publications and presentations at scientific meetings. The successful candidate will join the growing Statistics & Data Science group at Newcastle University and interact with the Statistics group at King's College London. The position is offered on a fixed term basis for two years from the start date. Generous funds are available for travel, training and other support. To apply, please complete the online application and attach a CV and covering letter. In your covering letter, please outline how you are either working towards, meet or exceed all the essential requirements for the role holder as outlined in the full advertisement, and highlight any expertise relevant to the described project. For all information enquiries about the position, please contact Prof Kevin Wilson (kevin.wilson(a)newcastle.ac.uk), Prof Cristiano Villa ( cristiano.villa(a)dukekunshan.edu.cn) or Prof Fabrizio Leisen ( fabrizio.leisen(a)kcl.ac.uk). You may leave the list at any time by sending the command SIGNOFF allstat to listserv(a)jiscmail.ac.uk, leaving the subject line blank.

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2-year PostDoc Position at TU Eindhoven (NL)
by Elisa Perrone 31 Oct '24

31 Oct '24

Dear colleagues, We currently have a vacancy for a 2-year PostDoc position in the Mathematical Statistics group at TU Eindhoven. The position comes with light educational duties but it is not attached to a specific research project. Therefore, there is considerable freedom for the candidate to independently pursue their own research agenda, as long as it has a good embedding within the research activities of the group. Here is the website with the job description: link <https://jobs.tue.nl/en/vacancy/postdoc-in-mathematical-statistics-1119766.h…>. The submission deadline is December 1, 2024. I would appreciate it if you could help us circulate the announcement and forward it to potentially interested candidates. Thank you very much, and best wishes, Elisa --- Elisa Perrone, Ph.D. Assistant Professor Department of Mathematics and Computer Science Eindhoven University of Technology elisaperrone.info <http://elisaperrone.info/>

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Seminario di Stanislav Smirnov (medaglia Fields 2010) a Roma Tre
by Elisabetta Candellero 31 Oct '24

31 Oct '24

Stanislav Smirnov (medaglia Fields 2010) terra' un seminario dal titolo "Coulomb gas and lattice models" il giorno mercoledi' 6 novembre, ore 16:00. Il seminario si terra' in Aula M1, Blocco Aule Lungotevere Dante 376 Dipartimento di Matematica e Fisica Universita' degli Studi Roma Tre Abstract: Even before the introduction of Conformal Field Theory by Belavin, Polyakov and Zamolodchikov, it appeared indirectly in the work of den Nijs and Nienhuis using Coulomb gas techniques. The latter postulate (unrigorously) that height functions of lattice models converge to the Gaussian Free Field, allowing to derive many exponents and dimensions of 2D lattice models. This convergence is in many ways mysterious, in particular it was never formulated in the presence of a boundary, but rather on a torus or a cylinder. We will discuss possible formulations on general domains or Riemann surfaces and their relations to CFT, SLE and conformal invariance of critical lattice models. Interestingly, new objects in complex geometry and potential theory seem to arise.

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Seminario di probabilita' (Roma Tre), 6/11/2024, Amitai Linker (Santiago del Cile)
by Elisabetta Candellero 31 Oct '24

31 Oct '24

*Data e orario*: Mercoledi' 6 novembre alle ore 14:30 Via della Vasca Navale 84, Dipartimento di Matematica e Fisica, Universita' degli Studi roma Tre, AULA B *Relatore*: Amitai Linker (Universidad Andrés Bello, Santiago, Cile) *Titolo*: "The contact process on dynamic scale-free networks" *Abstract*: In this talk, I will present recent results on the contact process on two specific types of scale-free, inhomogeneous random networks that evolve either through edge resampling or by resampling entire neighborhoods of vertices. Depending on the type of graph, the selected stationary dynamic, the tail exponent of the degree distribution, and the updating rate, we identify parameter regimes that result in either fast or slow extinction. In the latter case, we determine metastable exponents that exhibit first-order phase transitions. This is joint work with Emmanuel Jacob (ENS Lyon) and Peter Mörters (Universität zu Köln).

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Call for Contributed Talks at BNP 14
by Alessandra Guglielmi 31 Oct '24

31 Oct '24

Dear all, We invite the submission of contributed talks for the 14th International Conference on Bayesian Nonparametrics, to be held in person at UCLA in Los Angeles, United States, on June 23-27th, 2025. The deadline for submission is December 15, 2024. Contributed talks will be around 20 minutes long. Please note that the one-presentation-per-speaker policy is in effect: each participant of this meeting shall give at most one presentation (oral or poster). We encourage potential participants to submit their proposals, as there will be many opportunities for contributed speakers. Please submit your proposed talk using this form<https://bnp14.org/submissions/>, by December 15, 2024. Please indicate if, in the unfortunate case you were not selected for an Oral Talk, you would like to be automatically considered for a Poster Presentation. The results will be announced by the end of January 2025. A separate call for posters will be made soon. Thank you for your support of the 14th International Conference on Bayesian Nonparametrics. If you have any questions, please email bnp14ucla(a)gmail.com. For further information on the 14th International Conference on Bayesian Nonparametrics, see https://bnp14.org/ Best regards Alessandra Guglielmi, Chair of the Scientific Committee of BNP 14 https://bnp14.org/ -- Alessandra Guglielmi Dipartimento di Matematica - Politecnico di Milano Piazza Leonardo da Vinci, 32 - 20133 Milano (ITALY) tel ++39.02.23994641 e-mail: alessandra.guglielmi(a)polimi.it<mailto:alessandra.guglielmi@polimi.it>

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