Timeline for Why the underlying function of a monomorphism may not be an injection
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 3, 2014 at 7:13 | comment | added | goblin GONE | Section is too strong though; the function $\emptyset \rightarrow X$ is only a section if $X$ is the empty set, but it is always an injection. | |
| Apr 10, 2012 at 18:04 | comment | added | Andreas Blass | Mark is right. The usual name for morphisms like $f$, that have sections, is "retractions". | |
| Apr 10, 2012 at 8:27 | comment | added | Mark Grant | As a point of terminology, I would say that the morphism $f$ in the above has a section, in particular $g$ is one such. | |
| Apr 10, 2012 at 8:11 | history | answered | scolobb | CC BY-SA 3.0 |