Throughout, H will denote a separable Hilbert space, C(H) the set of all closed linear operators densely defined in H, R(H) the algebra of all bounded linear operators on H, and C, and N, and Z, the complex plane, the set of all positive integers, the set of all integers, respectively. For an operator S in C(H), S∗ will denote the Hilbert space adjoint of S… (More)