Let A be a C*-algebra and let X be a full (right) Hilbert A-module. It is shown that if the spectrum (A) over cap of A is discrete, then every closed K(X)-A-submodule of X is complemented in X, and conversely that if (A) double under bar is a T-1-space and if every closed K(X)-A-submodule of X is complemented in X, then (A) over cap is discrete.
机构:
Univ Zagreb, Fac Agr, Dept Informart Sci & Math, Sverosimunska Cesta 25, Zagreb 10000, CroatiaUniv Zagreb, Fac Agr, Dept Informart Sci & Math, Sverosimunska Cesta 25, Zagreb 10000, Croatia