doronshadmi
Penultimate Amazing
- Joined
- Mar 15, 2008
- Messages
- 13,320
This post is a perfect example of Doron’s inability to distinguish his misinterpretations from ‘Standard Mathematics’. It does not matter that we are talking about ‘Standard Mathematics’ (or in this case intervals) Doron will simply assert his misunderstanding as some failing in ‘Standard Mathematics’. Again Doron uses a notation that indicates his point ‘y’ is included in both of his red and blue intervals and presents his misinterpretation that this indicates point ‘y’ is “in more than a one location (blue AND red)” . Doron’s misunderstanding is simply a result of him not reading (or understanding) the post he is responding to, indicating that his ascriptions of red and blue, as shown above, both include the same location ‘y’ while the intervals [x,y) (y,z] would not include that location. The illusion Doron is that you understand ‘Standard Mathematics’ or common notation and you are the only one (at least on this thread) succumbing to that illusion. Again a boundary is one of those ‘"well defined" agreed definitions, terms, concepts, etc …” while your application of the words ‘edge’ and ‘direction’ are still undefined.
If y is a point, ( notated as [x,y) (y,z] ) then it is not blue and not red, because a point does not have a direction (it is not left and not right).
The standard Math wrongly understands [x,y) (y,z] because it does not get that a line segment is not a collection of points.
Since a line segment is not a collection of points, then [x,y) (y,z] means that y point is not the left edge of [x,y] line segment, and y point is not the right edge of [y,z] line segment.
Look how limited is standard math by get anything only in terms of local elements.
Furthermore, by Standard Math [x,y) (y,z] is not accurate because there is no way to define the exact element which is the predecessor of y in the case of [x,y) or the successor of y in the case of (y,z].
In order to ignore this inability Standard Math will tell you about non-countability or ugly creatures like supremum or infimum instead of simply understand that no collection of local elements (points) can be a non-local element (a line segment).
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