BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LMNO · Laboratoire de mathématiques Nicolas Oresme - ECPv6.16.4.1//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://lmno.unicaen.fr
X-WR-CALDESC:Évènements pour LMNO · Laboratoire de mathématiques Nicolas Oresme
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250328T140000
DTEND;TZID=Europe/Paris:20250328T150000
DTSTAMP:20250310T124529Z
CREATED:20241126T092815Z
LAST-MODIFIED:20250310T124529Z
UID:48140-1743170400-1743174000@lmno.unicaen.fr
SUMMARY:Séminaire TNGA : Vaidehee Thatte
DESCRIPTION:Oratrice : Vaidehee Thatte (King’s College London) \n\n\n\nTitre : Ramification Theory for Henselian Valued Fields \n\n\n\nRésumé : Ramification theory serves the dual purpose of a diagnostic tool and treatment by helping us locate\, measure\, and treat the anomalous behaviour of mathematical objects. In the classical setup\, the degree of a finite Galois extension of « nice » fields splits up neatly into the product of two well-understood numbers (ramification index and inertia degree) that encode how the base field changes. \n\n\n\nIn the general case\, however\, a third factor called the defect (or ramification deficiency) can pop up. The defect is a mysterious phenomenon and the main obstruction to several long-standing open problems\, such as obtaining resolution of singularities. The primary reason is\, roughly speaking\, that the classical strategy of « objects become nicer after finitely many adjustments » fails when the defect is non-trivial. I will discuss my previous and ongoing work in ramification theory in this setting; in particular\, it allows us to understand and treat the defect. Background in ramification theory or valuation theory is not assumed.
URL:https://lmno.unicaen.fr/evenement/seminaire-tnga-vaidehee-thatte/
CATEGORIES:Séminaire,Théorie des nombres
END:VEVENT
END:VCALENDAR