interpretation?”) The interpretative elements are forced by the
mathematical structure of the axioms of Hilbert space. [H] JB Hartle _Quantum Mechanics of Individual Systems_ American Journal of Physics Vol 36 #8 704-712 (1968) Hartle has investigated the N goes to infinity limit in more detail and more generally. He shows that the relative frequency operator, RF, obeys RF(i) |psi_1> |psi_2> …. = |< i|psi> |^2 |psi_1> |psi_2> …., for a normed state. Hartle regarded his derivation as essentially the same as Everett’s, despite being derived independently.
