Timeline for What category without initial object do you care about?
Current License: CC BY-SA 2.5
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 27, 2010 at 9:30 | comment | added | Simon Wadsley | I think this is the same as the question 'Why is one not prime?' It cannot be written as the product of two proper factors. | |
| Aug 27, 2010 at 8:57 | comment | added | Lennart Meier | Why the empty set is not irreducible? It has no proper subsets, therefore it cannot be union of two ones. Or am I wrong? | |
| Aug 27, 2010 at 8:23 | history | answered | Martin Brandenburg | CC BY-SA 2.5 |