RE: Research diaries #10: The real line, gaps in the rational numbers and the axiom of completeness
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Sorry I don't understand the question. r can only exist within the definition of A or B. So we can only view it as something contained in a set.
2, 15/10, 142/100 are in Q but not in B. But they do bound B from above.
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I pretty much understand you, ok.
please don't repeat this again, it's making you sound like a robot. 😂
How about using the Cauchy sequence approach, I like that one, it looks more understandable.
:P