=+36.2. Let T be arbitrary and let K(s, t) be a real function over T x T. Suppose that K is symmetric in the sense that K(s, t) = K(t,s) and nonnegative-definite in the sense that Ci,j-1 K(t1, t,)x;x; ≥ 0 for k ≥ 1, 11, ..., in T, and x1 ,..., Xk