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V  RELATIONSHIPS BETWEEN TWO SURFACES

In the same way that lines move, surfaces can also bulge together,  meeting at a singular position.

Just like two lines in these conditions share the same orientation, position and curvature, so do surfaces.

In their case, they are said not to be collinear, but coplanar.

Again, point O, where the surface first meet, is called a point of non-definity; marking the prospects of an exchange  or non-exchange of surfaces  to their respective motions prior to convergence.

In the same way that lines experience a continuation of the process at interchange at a point of non-definity, surfaces experience the same along a line of non-definity. Eventually the line of non-definity, which starts of as a closed loop, begins to fragment  as interchange ceases from one point to the next along it, presumably eventually disappearing all together.
Also, just as with the line and for the same reason, surfaces experience IDDI everywhere throughout their exterior regions  (comparable to the exterior portions of a line). Bear in mind, that as lines are confined to a flat plane, they may as well demonstrate the same behavior in volumetric space (three-dimensions), in which case their motion and changing curvature may define more elaborate shapes such as helical or corkscrew shapes and of course a great variety of random shapes. Needless to say, surfaces are not confined to a flat plane, but are altogether operative in three-dimensional volumetric space.

Just as the distribution of motion of a line may be represented by a series of uniformly spaced orthogonal vectors along the line, the distribution of motion of a surface may as well be represented by a set of uniformly space orthogonal vectors over the surface. Following is a transcendental distribution of motion of a surface.
 
 

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