Timeline for Weakened notion of extremal epimorphism?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 30 at 6:19 | comment | added | Moh | I do not see how $bc$ is a weakly extremal epic. I think it is monic yet not iso, and thus it can be decomposed as $(bc)(1)$ | |
| Nov 23, 2011 at 23:08 | comment | added | Boris Novikov | @ Sergei: I was glad to help (Рад был помочь) | |
| Nov 23, 2011 at 21:46 | comment | added | Sergei Akbarov | Сердечное спасибо! (Thank you very much, по-ихнему.) | |
| Nov 23, 2011 at 21:30 | vote | accept | Sergei Akbarov | ||
| Nov 23, 2011 at 19:33 | comment | added | Boris Novikov | @ Benjamin: Thank you very much. I mixed and correct the answer now. | |
| Nov 23, 2011 at 19:30 | history | edited | Boris Novikov | CC BY-SA 3.0 |
edited body
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| Nov 23, 2011 at 17:57 | comment | added | Benjamin Steinberg | Oh, I see it is weakly extremal because it cannot be written as a monic times an epi. Very nice. | |
| Nov 23, 2011 at 17:55 | comment | added | Benjamin Steinberg | Sorry, I meant a is not an iso. | |
| Nov 23, 2011 at 17:53 | comment | added | Benjamin Steinberg | I don't see why this works. Clearly bc is not an extremal epi since b is not an iso (only 1 is an iso). Why is it weakly extremal? | |
| Nov 23, 2011 at 17:51 | comment | added | Benjamin Steinberg | Any extremal epi is weakly extremal. Do you mean the opposite? | |
| Nov 23, 2011 at 14:40 | history | answered | Boris Novikov | CC BY-SA 3.0 |