Title: Note on Chow rings of nontrivial G-torsors over a field.
     Author: Nobuaki Yagita
     Author's e-mail address: yagita@mx.ibaraki.ac.jp
     Abstract: Let G(k) be a split reductive group over a field k
     corresponding to a compact Lie group G.
     Let E be a nontrivial G(k)-torsor over a field k.
     In this paper we study the Chow ring of nontrivial G(k)-torsors E.
     For example when (G,p)=(F_4,3), we see that the positive degree of 
     the mod 3 Chow ring of E is zero.