We will consider wave functions that are constructed as Hartree products of one-mode basis functions. These one-mode basis functions are denoted modals in analogy to orbitals of electronic structure theory. The modals can be either time-dependent or time-independent in the present context, and we will write it up in the time-dependent case with the timeindependent case following trivially. Typically, the time-dependent modals are constructed as a linear combination of primitive time-independent modals