Views of Intervals and Points
View 2 - Point continuum
- Point is a primitive object
- An interval is a set of points
- Intervals are either open or closed
- A closed interval can consists of a single point
View 3 - Glass continuum
- Interval is a primitive object
- The point where intervals meet is not contained in either interval
- No distinction between open and closed intervals
- An interval cannot consist of a single point