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1. • CommentRowNumber1.
   • CommentAuthorTobyBartels
   • CommentTimeJan 21st 2017
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   Author: TobyBartels
   Format: MarkdownItexI put the constructive version of [[coalgebra of the real interval]] there and straightened up the references.

   I put the constructive version of coalgebra of the real interval there and straightened up the references.

2. • CommentRowNumber2.
   • CommentAuthorTodd_Trimble
   • CommentTimeJan 21st 2017
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   Author: Todd_Trimble
   Format: MarkdownItexThanks, Toby! As you know, there is also a coalgebraic description of a half-open interval $[0, \infty)$: the terminal coalgebra for the functor that takes a linearly ordered set $X$ to $\omega \times X$ endowed with the lexicographic order. We have material on this at [[continued fraction]].

   Thanks, Toby! As you know, there is also a coalgebraic description of a half-open interval $[0, \infty)$: the terminal coalgebra for the functor that takes a linearly ordered set $X$ to $\omega \times X$ endowed with the lexicographic order. We have material on this at continued fraction.

3. • CommentRowNumber3.
   • CommentAuthorTobyBartels
   • CommentTimeJan 22nd 2017
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   Author: TobyBartels
   Format: MarkdownItexNow I want to think about whether that can be thickened up to be constructively valid too.

   Now I want to think about whether that can be thickened up to be constructively valid too.