Timeline for Approximate intermediate value theorem in pure constructive mathematics
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 26, 2016 at 11:23 | comment | added | Franka Waaldijk | Oops, I hit enter when I was still editing my comment. Because I wanted to start with saying that I really think that Matt's second proof is very beautiful! I have to get the hang of MO, sorry. | |
| Nov 26, 2016 at 11:21 | comment | added | Franka Waaldijk | I still don't have enough reputation to comment on any other answer except my own... So I'll be a little creative.By the way, I said that in Matt's first proof there is a hidden use of countable choice, but it really is a hidden use of dependent choice. This is the "only" failure that I see in that answer (well, it ceases to be an answer then I suppose), and I am surprised that no one noticed the use of DC in that proof. | |
| Nov 26, 2016 at 10:38 | comment | added | Franka Waaldijk | Like I said, in CLASS, INT and RUSS we can prove that "an arbitrary pointwise continuous function" coincides with "a #-morphism". That is why I consider my answer to be an answer. For a much more detailed answer see my reply to your same question on constructive-news. | |
| Nov 25, 2016 at 19:27 | comment | added | Mike Shulman | This may be interesting, but it does not answer the question, which was specifically about "an arbitrary pointwise continuous function". | |
| Nov 25, 2016 at 10:37 | history | edited | Franka Waaldijk | CC BY-SA 3.0 |
added 1 character in body
|
| Nov 25, 2016 at 10:08 | review | Late answers | |||
| Nov 25, 2016 at 10:29 | |||||
| Nov 25, 2016 at 9:58 | history | edited | Franka Waaldijk | CC BY-SA 3.0 |
edited body
|
| Nov 25, 2016 at 9:55 | review | First posts | |||
| Nov 25, 2016 at 12:09 | |||||
| Nov 25, 2016 at 9:53 | history | answered | Franka Waaldijk | CC BY-SA 3.0 |