In this paper we consider the
case in which random variables Xj take values in a real, separable Hilbert
space ℋ. We look at a linear form ∑AjXj where each Aj is a bounded
linear operator in ℋ. We then assume that this linear form is identically
distributed with a monomial and form conditions under which it is possible to
deduce that the common distribution of the random variables is the Gaussian
distribution.