Dear Colleagues,
We would like to invite you to the following SPASS seminar, jointly organized by UniPi, SNS, UniFi and UniSi (abstract below):
*Alpha-unstable flows and the fast dynamo problem* by *Michele Coti Zelati* (Imperial College London)
The seminar will take place on *THURSDAY, 25.09.2025* at *09:00 CEST *(mind unusual date and time) in Aula Seminari, Dipartimento di Matematica, UNIPI and streamed online at this link https://meet.google.com/gji-phwo-vbg.
Best regards Mario Maurelli
https://sites.google.com/unipi.it/spass https://www.google.com/url?q=https://sites.google.com/unipi.it/spass&source=gmail-imap&ust=1665669490000000&usg=AOvVaw07o0tKOUGmZjDDF2Ta7pQY
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*Title: **Alpha-unstable flows and the fast dynamo problem*
*Abstract: The fast dynamo problem concerns the generation and maintenance of magnetic fields by fluid motion through the process of electromagnetic induction. In passive vector advection, this can be formulated as the exponential growth of the magnetic energy, at a resistivity-independent rate. In this talk, I will provide a construction of a Lipschitz, divergence-free and time-independent velocity field that is a fast dynamo on the whole space.*