Re: Incompleteness of Cantor's enumeration of the rational numbers

On 05.11.2024 18:25, Jim Burns wrote:
 

>
Instead, there are boundary points.
  For each x not.in the intervals,
  each open set Oₓ which holds x
  holds points in the intervals and
  points not.in the intervals.
x is a boundary point.

 For every definable x we can decide whether it is inside the interval including its endpoints or outside. No open intervals are necesseary or useful. Your trick is cunning bot not accepted.