Normal contractive projections preserve type

Given a JBW*-triple Z and a normal contractive projection P on it, we show that the (Murray-von Neumann) type of each summand of the range of P is dominated by the type of Z.

(This paper has appeared in J. Operator Theory 51 (2004), 281-301)

Cho-Ho Chu < maa01chc@gold.ac.uk >

Matthew Neal < nealm@denison.edu >

Bernard Russo < brusso@math.uci.edu >