- #1
lugita15
- 1,554
- 15
A theorem of real analysis states that any open set in [itex]\Re^{n}[/itex] can be written as the countable union of nonoverlapping intervals, where "interval" means a parallelopiped in [itex]\Re^{n}[/itex], and nonoverlapping means the interiors of the intervals are disjoint. Well, what about something as simple as an open ball in [itex]\Re^{2}[/itex] or [itex]\Re^{3}[/itex]? Intuitively, I can't visualize how non-overlapping rectangles, even a countably infinite number of them, could ever make a circle. If you could write it as such a union, then just pick a point on the circumference of the circle: it is either a corner of a rectangle or on the side of a rectangle. Either way, it would not look like a circle near that point.
Any help would be greatly appreciated.
Thank You in Advance.
Any help would be greatly appreciated.
Thank You in Advance.