A Local Resolution of the Problem of Time. IV. Quantum outline and piecemeal Conclusion

In this final piecemeal treatment of local Problem of Time facets, and underlying Background Independence aspects, we first reconsider the ten local facets and aspects considered so far at the quantum level. This is essential both to appreciate past conceptualization and naming for these aspects and facets, and because the quantum Problem of Time is a more advanced goal than its classical counterpart. The case is made that each piecemeal aspect of Background Independence can be incorporated, i.e. each piecemeal facet of the Problem of Time is resolvable, in a local classical sense, using just Lie's Mathematics. This case is then extended in Articles V to XIII to a joint resolution, i.e. successfully handling the lion's share of the Problem of Time that resides in facet interferences. Relationalism, Closure, Observables and Constructions are argued to be super-aspects ordered to form a claw alias 3-star digraph with Closure as nexus. This is realized twice: faithfully for spacetime and with some modification in the split-Relationalism canonical case. There is finally a Wheelerian 2-way route between the two realizations, with Spacetime Construction from Space in one direction and Refoliation Invariance in the other.