et X and Z be compact
Hausdorff spaces, and let P be a linear subspace of C(X) which is isometrically
isomorphic to C(Z). In this paper conditions, some necessary and some sufficient, are
presented which insure that P is complemented in C(X). For example if X is
metrizable, P contains a strictly positive function, and the decomposition
induced on X by P is lower semi-continuous then P is complemented in
C(X).