Timeline for Surjectivity from union of a set system to the set system
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 18, 2015 at 17:17 | comment | added | Ramiro de la Vega | You may want to take a look at "Transversal Theory: An account of some aspects of combinatorial mathematics" by L. Mirsky. The whole book is about this kind of problems. Perhaps for the application you have in mind (and didn´t tell us about) there is such a $\varphi$. | |
| Mar 18, 2015 at 11:46 | comment | added | user62017 | Thanks Tom! - Apparently because there are easy examples giving a negative answer... | |
| Mar 18, 2015 at 8:33 | comment | added | Tom De Medts | I wonder why this question got several downvotes. I upvoted. | |
| Mar 18, 2015 at 6:59 | review | Close votes | |||
| Mar 18, 2015 at 11:31 | |||||
| Mar 18, 2015 at 6:50 | vote | accept | CommunityBot | ||
| Sep 2, 2015 at 16:36 | |||||
| Mar 18, 2015 at 6:41 | answer | added | Dominic van der Zypen | timeline score: 0 | |
| Mar 18, 2015 at 6:40 | answer | added | Noah Schweber | timeline score: 1 | |
| Mar 18, 2015 at 6:34 | history | asked | user62017 | CC BY-SA 3.0 |