BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Sabre//Sabre VObject 4.5.8//EN
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:Europe/Zurich
X-LIC-LOCATION:Europe/Zurich
TZURL:http://tzurl.org/zoneinfo/Europe/Zurich
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:19810329T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:19961027T030000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:news1792@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20250423T195152
DTSTART;TZID=Europe/Zurich:20250508T141500
SUMMARY:Number Theory Seminar: Vaidehee Thatte (King's College London)
DESCRIPTION:Title: Ramification Theory for Henselian Valued Fields   Abstr
 act: Ramification theory serves the dual purpose of a diagnostic tool and 
 treatment by helping us locate\, measure\, and treat the anomalous behavio
 ur of mathematical objects. In the classical setup\, the degree of a finit
 e Galois extension of "nice" fields splits up neatly into the product of t
 wo well-understood numbers (ramification index and inertia degree) that en
 code how the base field changes. In the general case\, however\, a third f
 actor called the defect (or ramification deficiency) can pop up. The defec
 t is a mysterious phenomenon and the main obstruction to several long-stan
 ding open problems\, such as obtaining resolution of singularities. The pr
 imary reason is\, roughly speaking\, that the classical strategy of "objec
 ts become nicer after finitely many adjustments" fails when the defect is 
 non-trivial. I will discuss my previous and ongoing work in ramification t
 heory in this setting\; in particular\, it allows us to understand and tre
 at the defect. Background in ramification theory or valuation theory is no
 t assumed.\\r\\nSpiegelgasse 5\, Seminarraum 05.002
X-ALT-DESC:<p>Title: Ramification Theory for Henselian Valued Fields<br /> 
 &nbsp\;<br /> Abstract: Ramification theory serves the dual purpose of a d
 iagnostic tool and treatment by helping us locate\, measure\, and treat th
 e anomalous behaviour of mathematical objects. In the classical setup\, th
 e degree of a finite Galois extension of "nice" fields splits up neatly in
 to the product of two well-understood numbers (ramification index and iner
 tia degree) that encode how the base field changes.<br /> In the general c
 ase\, however\, a third factor called the defect (or ramification deficien
 cy) can pop up. The defect is a mysterious phenomenon and the main obstruc
 tion to several long-standing open problems\, such as obtaining resolution
  of singularities. The primary reason is\, roughly speaking\, that the cla
 ssical strategy of "objects become nicer after finitely many adjustments" 
 fails when the defect is non-trivial. I will discuss my previous and ongoi
 ng 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.</p>\n<p>Spiegelgasse 5\, Seminarraum 0
 5.002</p>
DTEND;TZID=Europe/Zurich:20250508T151500
END:VEVENT
END:VCALENDAR