The linearity of NII depends on the linearity of F and a. QM has certain postulates that have to be overcome first, such as any state can be written as a linea

The linearity of NII depends on the linearity of F and a. QM has certain postulates that have to be overcome first, such as any state can be written as a linear combination of eigenstates, etc. You can see them here: http://vergil.chemistry.gatech.edu/notes/quantrev/node20.html http://vergil.chemistry.gatech.edu/notes/quantrev/node20.htm...