On this map you can pursue schematically follow the flow of thought described in chapter 1-4, where Heim explains why ther must exist a fundamental geometric unit.
The entries of the general energy impulse density tensor describe all kinds of physical interactions (right-hand side), which can also be understood geometrically as deformations of space (left-hand side).
The type of this geometry is deduced in chapter 1-3. It results from the fact that every physical type of interaction produces its own metric.
The term energy density
describes density
of energy per volume of space. Now, the following is very simple. I
wonder why this is still not known in conventional physics: If you
extend this quotient with time in both the numerator and the denominator, you
get the density of effect (energy * time) per space-time. Since we know
from experience in quantum physics that the effect is quantized, all
other values in this equation must also be quantized, particularly all
coordinates of space-time.
Since the left-hand side is a geometrical description equivalent to this
physical description, this side must also be transferred in a form of quantized
terms.
The installation of this quantized physical description into the uniform structure tensor is shown by Heim in chapter II-1. This results in the description of the material world in six physical dimensions.