Being A _ 0 and A _ f two matrices, the angular displacement matrix between them can be obtained as \ Delta A = A _ f.
2.
Paul Dirac decided that the essence of Heisenberg's work lay in the very feature that Heisenberg had originally found problematical the fact of non-commutativity such as that between multiplication of a momentum matrix by a displacement matrix and multiplication of a displacement matrix by a momentum matrix.
3.
Paul Dirac decided that the essence of Heisenberg's work lay in the very feature that Heisenberg had originally found problematical the fact of non-commutativity such as that between multiplication of a momentum matrix by a displacement matrix and multiplication of a displacement matrix by a momentum matrix.