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DTSTART:20210328T030000
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BEGIN:VEVENT
DTSTAMP:20260404T110212Z
UID:1611838800@ist.ac.at
DTSTART:20210128T140000
DTEND:20210128T150000
DESCRIPTION:Speaker: Jörg Jahnel\nhosted by Tim Browning\nAbstract: I will
  report on investigations\, joint with Damaris Schindler (Göttingen)\, co
 ncerning the algebraic and transcendental Brauer-Manin obstructions to int
 egral points on complements of a hyperplane section in degree four del Pez
 zo surfaces. We discuss moreover two concepts of an obstruction at an arch
 imedean place. Concrete examples are given of pairs of non-homogeneous qua
 dratic polynomials in four variables representing $(0\,0)$ over $\\bbQ$ an
 d over $\\bbZ_p$ for all primes $p$\, but not over $\\bbZ$. By blow-up\, t
 hese yield cubic polynomials in three variables all integral solutions of 
 which satisfy a gcd condition.
LOCATION:https://mathseminars.org/seminar/AGNTISTA\, ISTA
ORGANIZER:birgit.oosthuizen-noczil@ist.ac.at
SUMMARY:Jörg Jahnel: On integral points on open degree four del Pezzo surf
 aces
URL:https://talks-calendar.ista.ac.at/events/2894
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