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X-WR-CALNAME:Département de mathématiques et applications
X-ORIGINAL-URL:https://www.math.ens.psl.eu
X-WR-CALDESC:évènements pour Département de mathématiques et applications
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TZID:Europe/Paris
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TZOFFSETFROM:+0100
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TZNAME:CEST
DTSTART:20150329T010000
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DTSTART:20151025T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20151106T110000
DTEND;TZID=Europe/Paris:20151106T110000
DTSTAMP:20260416T021127
CREATED:20151106T100000Z
LAST-MODIFIED:20211104T095810Z
UID:8228-1446807600-1446807600@www.math.ens.psl.eu
SUMMARY:Nonarchimedean globally valued fields
DESCRIPTION:In a joint research project with Itay Ben Yaacov\, we study a class of fields enriched with a global structure tying together their various valuations by a product formula. This is an elementary class in the sense of continuous logic
URL:https://www.math.ens.psl.eu/evenement/nonarchimedean-globally-valued-fields/
LOCATION:Sophie Germain salle 1021
CATEGORIES:Séminaire Géométrie et théorie des modèles
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20151106T141500
DTEND;TZID=Europe/Paris:20151106T141500
DTSTAMP:20260416T021127
CREATED:20151106T131500Z
LAST-MODIFIED:20211104T095610Z
UID:8226-1446819300-1446819300@www.math.ens.psl.eu
SUMMARY:The p-adic analog of Artin-Schreier Theorem - revisited (II)
DESCRIPTION:A famous Theorem by Artin and Schreier characterizes the real closed fields as being those fields which have a finite non-trivial absolute Galois group. Instances of p-adic analogs of this Theorem are known (Neukirch\, Pop\, Koenigsmann\, Efrat)\, but there is much more to this story. Namely I will give a ‘minimalistic’ p-adic analog\, which as in the Artin-Schreier Theorem\, invoves only finite groups. This aspect of the story relates to the birational p-adic section conjecture\, etc.
URL:https://www.math.ens.psl.eu/evenement/the-p-adic-analog-of-artin-schreier-theorem-revisited-ii/
LOCATION:Sophie Germain salle 1021
CATEGORIES:Séminaire Géométrie et théorie des modèles
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20151106T160000
DTEND;TZID=Europe/Paris:20151106T160000
DTSTAMP:20260416T021127
CREATED:20151106T150000Z
LAST-MODIFIED:20211104T095809Z
UID:8227-1446825600-1446825600@www.math.ens.psl.eu
SUMMARY:Counting points vs. counting extensions
DESCRIPTION:In this talk\, I will explain how to relate the two counting problems in the title by generalizing the McKay correspondence to number-theoretic base fields\, that is\, local fields and number fields. Over local fields\, generalizing the McKay correspondence by Batyrev and Denef-Loeser\, one can relate stringy invariants of quotient varieties to mass formulas of extensions of local fields. Over number fields\, using the local result and a heuristic argument\, one can (less tightly than in the local case) relate Manin’s conjecture on rational points of Fano varieties to Malle’s conjecture on extensions of number fields.
URL:https://www.math.ens.psl.eu/evenement/counting-points-vs-counting-extensions/
LOCATION:Sophie Germain salle 1021
CATEGORIES:Séminaire Géométrie et théorie des modèles
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