What is a space border?
It is a view on the space itself, i.e., frequently we associate the space with its border. The main property of border is its ability to be associated with some coordinate or point and this is why we can treat space border as an object. For the whole space it is difficult to say where it is living. Space border is also a point where space functions are concentrated and executed. We say that space border divides external and internal parts of the space so that in order for an agent to change its position in space it has to intersect the border where its functions are automatically activated.