Buonasera, Vi segnalo il seguente seminario (https://www.dss.uniroma1.it/it/node/8750) di domani 27 Marzo del prof. Enrico Scalas, che si terrà presso il Dipartimento di Scienze Statistiche (Sapienza Università di Roma, edificio CU002) in aula V, alle ore 12:00: *The Ehrenfest-Brillouin Model and its Applications* The Ehrenfest-Brillouin Model (EBM) is a framework for understanding complex systems. We begin by establishing a hierarchy of state descriptions, moving from individual descriptions to statistical descriptions before arriving at "frequencies of frequencies." This structural approach facilitates a rigorous definition of the EBM as a random dynamic process whose state space coincides with these world descriptions. The EBM is an irreducible and aperiodic Markov chain, ensuring the convergence to a unique stationary distribution regardless of the initial state. The EBM dynamics incorporates interaction parameters that allow the system to recover Maxwell-Boltzmann, Bose-Einstein, or Fermi- Dirac statistics depending on the degree of dependency between agents. The model’s stochastic rules naturally yield emergent phenomena such as power laws. Finally, we discuss the broad applicability of the EBM in physics and the social sciences, for example in modeling wealth distribution. The EBM provides a unifying bridge between the combinatorial foundations of statistical mechanics and socio-economic theory. Di seguito link per il collegamento online https://uniroma1.zoom.us/j/83625004899?pwd=bXCtz0 mp759PUh2lkqT0BUoVa0Uegg.1 Passcode: 123456 Buona serata, Lorenzo Facciaroni -- *Fai crescere le giovani ricercatrici e i giovani ricercatori*** *con il  5 per mille alla Sapienza* Scrivi il codice fiscale dell'Università  *80209930587 **Cinque per mille <https://www.uniroma1.it/it/node/23149>*