ABSTRACT
Then the map / / : (x \ , . . . , x n) i-► (x\ : • • • : xz_i : 1 : x, : • • • : x n) defines a bijection between A"(fi) and C/f*. Moreover, Pn(Q) = |J"=1 [//. Each Ut is open for the Zariski topology, and the maps / / are homeomorphisms (for the Zariski topology on A”(Q) and the induced topology on Ui).
