REMINDER - SISSA Colloquium TODAY

[ICTP Math Section]

Dear all,

On behalf of prof. Tamara Grava, we are pleased to invite you to the 
SISSA Colloquium *"The synergy between perturbative methods and machine 
learning techniques in Celestial Mechanics"*, a special lecture with 
*Alessandra Celletti* from Università di Roma Tor vergata.

The colloquium is scheduled for *Wednesday, 10 Apr, 2024 - *from*16:30 * 
to*17:30 *in*Aula Magna Budinich, SISSA.*

*Abstract. * Classical perturbation theory is a cornerstone of Celestial 
Mechanics, since it allows one to determine an approximate solution of 
the dynamics. It applies typically to nearly-integrable Hamiltonian 
systems. Further developments of perturbation theory are represented by 
KAM theory and Nekhoroshev's theorem. All these mathematical theories 
have been successfully applied to investigate stability in models of 
Celestial Mechanics and Astrodynamics. In some cases, they can even give 
results in dissipative systems, most notably the so-called conformally 
symplectic systems, which enjoy important geometric properties.
As a complement of the analytical studies, machine learning methods can 
be used to get information on the dynamics. These techniques have been 
used to classify  regular and chaotic motions in satellite's rotational 
dynamics and to cluster space debris after a break-up event. These 
results have the potential to pave the way to a synergetic use of 
perturbative and ML methods.

*Short bio.* Alessandra Celletti received her PhD in 1989 at the Swiss 
Federal Institute of Technology in Zurich (ETH) under the supervision of 
Jürgen Moser and Jörg Waldvogel. She is currently Full Professor of 
Mathematical Physics at the University of Rome Tor Vergata; since 2020 
she is member of the governing board and vice-President of ANVUR. Her 
research interests concern Celestial Mechanics and Dynamical Systems 
with particular reference to perturbative methods and KAM theory with 
applications to Solar system dynamics. She is a founding member of the 
Italian Society of Celestial Mechanics and Astrodynamics, which she 
chaired from 2001 to 2013. Since 2010 she has been an honorary member of 
the "Celestial Mechanics Institute". In 2018 became President of the 
Scientific Committee in Celestial Mechanics of the International 
Astronomical Union, while in 2019 she has been named in the Governing 
Board of the Italian Space Agency (until 2020). In 2023 she has been 
awarded the “Dirk Brouwer Career Award” from the American Astronomical 
Society. The asteroid 117539 bears her name.

The event will also be livestreamed: 
https://youtube.com/live/WhRoaB_TzuE?feature=share 
<https://youtube.com/live/WhRoaB_TzuE?feature=share>

*Refreshments will be served at the end of the seminar.*


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