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UID:20260415T071948EDT-8627DjhLoS@132.216.98.100
DTSTAMP:20260415T111948Z
DESCRIPTION:Title: The Equivalence Problem in Analytic Dynamics.\n\n\n	Abstr
 act: A central problem in local dynamics is the equivalence problem: when 
 are two analytic systems locally equivalent under an analytic change of co
 ordinates? In the neighbourhood of a singular point\, representatives of e
 quivalence classes could be given by normal forms. But\, most often\, the 
 changes of coordinates to normal form diverge. Why? What does it mean? Unf
 olding the singularities reveals the geometric obstructions to the converg
 ence to normal form. In this talk\, we discuss a class of singularities an
 d their unfoldings for which we can provide moduli spaces for the equivale
 nce problems. We explain the common geometric features of these singularit
 ies\, and how the study of the unfolding of these singularities allows und
 erstanding both the singularities themselves\, and the obstructions to the
  existence of analytic changes of coordinates to normal form.\n\nVenue: Un
 iversity of Ottawa\, STEM building\, room 664 (unless otherwise specified)
 \n
DTSTART:20260211T210000Z
DTEND:20260211T220000Z
SUMMARY:Christiane Rousseau (Université de Montréal)
URL:https://www.mcgill.ca/mathstat/channels/event/christiane-rousseau-unive
 rsite-de-montreal-371118
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