Seminar series
Date
Thu, 30 Oct 2008
Time
17:00 -
18:00
Location
L3
Speaker
Jochen Koenigsmann
Organisation
Oxford
I will present a universal definition of the integers in the field of rational numbers, building on work discussed by Bjorn Poonen in his seminar last term. I will also give, via model theory, a geometric criterion for the non-diophantineness of Z in Q.