Jerison introduced the
Banach spaces Cσ(S) of continuous real or complex-valued odd functions with
respect to an involutory homeomorphism σ : S → S of the compact Hausdorff space
S. It has been conjectured that any Banach space of the type Cσ(S) is isomorphic to
a Eanach space of all continuous functions on some compact Hausdorff space. This
conjecture is shown to be true if either (1) lS is a Cartesian product of compact
metric spaces or (2) S is a linearly ordered compact Hausdorff space and σ has at
most one fixed point.