Event Detail

Event Type: 
Number Theory Seminar
Date/Time: 
Tuesday, January 13, 2015 - 16:00 to 17:00
Location: 
Kidder 350

Speaker Info

Local Speaker: 
Abstract: 

Given a global field K, we characterize those automorphisms of P^n defined over K which induce isometries of P^n over all places of K.  The answer is that only the obvious examples actually occur.  The proof uses linear algebra and the theory of heights.