The arrow of entropy (as thermodynamic property) has the same directionality as the arrow of time. As explained in post 3 there is no difference between the directions of time and the directions in space. Consequently the freedom of changes in entropy applies to all directions in space-time, following the directions of time.
Entropy is a measure of disorder or more accurately of unpredictability. The intrinsic uncertainty of time (the time uncertainty principle introduced in post 16) implicates that it is impossible to measure time-distance relations with absolute certainty. Entropy can be considered the result of a continuous process of an endogenous increase of either mass or energy in space-time (see also post 6). Gravitation as I see it is the source of entropy.
As explained in post 13, the course of time varies between extreme fast and extreme slow, it cannot be infinite fast or infinite slow.
This means that an increase of entropy in Black Holes evolves at a slower rate than an increase of entropy outside Black Holes (see also posts 12 and 17). By the same token 0-entropy is an impossibility.
At a certain distance from a Black Hole there is a place where light rays are influenced by the Black Hole’s gravitational pull or time-delay to the extent that these rays start to slow down and turn off to the Black Hole. Other light rays happen to get just enough extra speed enabling them to turn away from the Black Hole and disappear into the space surrounding it (see also post 12).
This means that a Black Hole is surrounded by an Interchange Horizon at which light rays share the same constant speed as long as they remain in that area.
The circumference of the Interchange Horizon is a measure of a Black Hole’s mass.