April 11th, 2016, 08:00 AM  #21 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,690 Thanks: 2669 Math Focus: Mainly analysis and algebra 
So what? We already know that. Both sets are indexed by the natural numbers.

April 11th, 2016, 09:02 AM  #22 
Global Moderator Joined: Dec 2006 Posts: 21,026 Thanks: 2257  
April 11th, 2016, 09:22 AM  #23 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,690 Thanks: 2669 Math Focus: Mainly analysis and algebra 
The marked series are countable. There is a bijection between the position of the marked element and the natural numbers. Of course, not all sequences are marked.


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argument, cantor, diagonal, summary, wrong 
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