One of the deepest result in quantum physics is that the Wave-Particle-Duality-Relations correspond to a modern formulation of the Heisenberg uncertainty principle stated in terms of entanglement entropies: a Bell-type argument in the context of T-duality's winding modes, shows the action describing any particle implies an ontological non-locality intrinsic to the notion of 'particle' and in this series of posts, I will show how that entails that 'non-local-particles' can be symmetrically identified with strings in string-theory. Consider, as I showed, the non-commutative action for the dynamics of N-branes of type $J$ in the string regime:

with the D-1-action:

and we get from:

the d-1 mass-term:

In this post, I will carry a Calabi-Yau fourfold compactification of M-theory in a topologically smooth way. Since M-theory is the only quantum theory of gravity that provably has a finite renormalization group and is the only complete self-consistent GUT, such 4-D compactifications are essential in order to have a correspondence with 4-D spacetime. Recall I derived, via Clifford algebraic symmetry, the total action:

which is deep since Clifford algebras are a quantization of exterior algebras, and applying to the 'Einstein-Minkowski' tangent bundle, we get via Gaussian matrix elimination, an expansion of ${\not D^{SuSy}}$ via Green-functions, yielding M-Theory's action:

with $k$ the kappa symmetry gravitonic term and the supergravitational Hamiltonian term being:

Let ${Y_4}$ be a smooth Calabi-Yau fourfold and start with the bosonic 11-D SuGra sector