Timeline for What category without initial object do you care about?
Current License: CC BY-SA 2.5
16 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 5, 2010 at 15:32 | answer | added | arsmath | timeline score: 4 | |
| Aug 27, 2010 at 22:35 | comment | added | Cam McLeman | But if you do that, then this comment will look really out of place... | |
| Aug 27, 2010 at 22:02 | answer | added | Adam | timeline score: 5 | |
| Aug 27, 2010 at 21:13 | answer | added | Leonid Positselski | timeline score: 2 | |
| Aug 27, 2010 at 19:32 | comment | added | Andrew Stacey | @B.Bischof: it did. There was a comment which had three suggestions of categories without initial objects. I thought that at least two of these did have initial objects and so said so. It appears that the original comment has been deleted. To avoid further confusion, I have now deleted my comment! Once you've read this, I recommend that we delete these two comments to remove all sources of confusion! | |
| Aug 27, 2010 at 19:03 | answer | added | André Henriques | timeline score: 2 | |
| Aug 27, 2010 at 18:38 | comment | added | B. Bischof | @Andrew I don't understand your comment, perhaps it relates to a comment that has been deleted. | |
| Aug 27, 2010 at 16:43 | answer | added | Peter Arndt | timeline score: 2 | |
| Aug 27, 2010 at 16:15 | answer | added | Chris Schommer-Pries | timeline score: 9 | |
| Aug 27, 2010 at 9:50 | comment | added | Kevin Ventullo | I am also curious. If a category has no initial object, you can always just formally adjoin an initial object such that nothing maps into it (except itself). This is basically the role the empty set plays in the concrete categories listed. | |
| Aug 27, 2010 at 9:22 | answer | added | Urs Schreiber | timeline score: 12 | |
| Aug 27, 2010 at 8:37 | comment | added | Victor Protsak | Can you, please, indicate examples of constructions "designed to accommodate categories without an initial object" you had in mind? Otherwise, your question risks turning into a not particularly illuminating fishing expedition. | |
| Aug 27, 2010 at 8:23 | answer | added | Martin Brandenburg | timeline score: 4 | |
| Aug 27, 2010 at 8:10 | answer | added | Andrew Stacey | timeline score: 21 | |
| Aug 27, 2010 at 7:04 | comment | added | B. Bischof | I doubt that category theory is an appropriate tag, but it was the best I could do for an Arxiv subject area. | |
| Aug 27, 2010 at 7:04 | history | asked | B. Bischof | CC BY-SA 2.5 |