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SUMMARY:IC Colloquium: Mirroring the world: How symmetry shapes hierarchic
 al beliefs
DTSTART:20260526T140000
DTEND:20260526T150000
DTSTAMP:20261002T044730Z
UID:0b5cf382c716c7432d641b5829bbcf81bad261e3ebc46387f7254c26
CATEGORIES:Conferences - Seminars
DESCRIPTION:By: Fernando Rosas - University of Sussex\nVideo of his talk\
 n\nAbstract\nMany systems exhibit nested emergent layers with their own ru
 les and regularities\, and our knowledge about them seems naturally organi
 sed around these levels. In this talk\, I will put forward a formal approa
 ch to capture this correspondence\, linking hierarchical structures in obj
 ective processes to Bayesian beliefs held by observers. For doing this\, I
  will first present a framework to formalise the existence of self-contain
 ed levels via the concepts of informational\, causal\, and computational c
 losure. Then\, I will introduce a formal approach to world modelling\, exa
 mining what it means to build an efficient internal representation of a pe
 rception-action loop. Finally\, we will put these ideas together to identi
 fy equivariance of objective dynamics as a sufficient condition for the ex
 istence of multi-level beliefs. These ideas will be illustrated by a range
  of examples from statistical mechanics and computational neuroscience.\n\
 nBio\nFernando Rosas trained in mathematics and engineering at the Pontifi
 cia Universidad Católica de Chile (BSc\, MSc\, PhD)\, with additional und
 ergraduate study in music composition and philosophy. He held postdoctoral
  positions at KU Leuven\, National Taiwan University\, and Imperial Colleg
 e London. He now works as Assistant Professor at the University of Sussex\
 , being also a Research Fellow at Imperial College London and the Universi
 ty of Oxford.\n\nMore information
LOCATION:BC 420 https://plan.epfl.ch/?room==BC%20420 https://epfl.zoom.us/
 j/63733094483
STATUS:CONFIRMED
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