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UID:6384@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20210610T140000
DTEND;TZID=Europe/Paris:20210610T150000
DTSTAMP:20250118T133020Z
URL:https://www.i2m.univ-amu.fr/evenements/a-canonical-stratification/
SUMMARY:Immanuel Halupczok (Heinrich-Heine-Universität Düsseldorf): A can
 onical stratification
DESCRIPTION:Immanuel Halupczok: A stratification of an algebraic set X ⊂ 
 ℂ^n (or ℝ^n) is supposed to capture "how singular" the different point
 s of X are: If x ∈ X lies in a stratum S\, then there should exist a nei
 ghbourhood of x on which X is roughly translation invariant along S. This 
 intuitive idea can be made precise if one replaces ℂ (or ℝ) by a bigge
 r field K containing infinitesimal elements. Using this approach\, we will
  construct an entirely canonical stratification of X. A motivation for thi
 s was to get a better control of the local Poincaré series associated to 
 singularities of X. We will see how the canonical stratification indeed pr
 ovides some control (though there are also questions that are still open).
  This is work in progress with David Bradley-Williams.\n\n
ATTACH;FMTTYPE=image/jpeg:https://www.i2m.univ-amu.fr/wp-content/uploads/2
 021/04/Immanuel_Halupczok.jpg
CATEGORIES:Groupe de travail,Singularités,Virtual event
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