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Published online by Cambridge University Press: 24 October 2008
1. In this note we shall prove the
Theorem 1. Letbe a linear space of (real or complex) functions f(s) defined in the interval 0 ≤ s ≤ 1 subject to the following two conditions:
(i) every function of the infinite sequence 1, s, s2, …, sn, … is an element of;
(ii) two elements, f(s) and g(s), ofare to be considered as distinct if, and only if, they differ on a set of positive measure in the interval 0 ≤ s ≤ 1.