Timeline for Understanding proof about chromatic number
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 11, 2018 at 7:05 | vote | accept | pi66 | ||
| Oct 10, 2018 at 22:05 | history | edited | Martin Sleziak |
added the (graph-colorings) tag - this seems to be the closest one to chromatic number
|
|
| Oct 10, 2018 at 14:25 | answer | added | Ben Barber | timeline score: 4 | |
| Oct 10, 2018 at 13:02 | comment | added | Ben Barber | I'm inclined to agree. The argument is of a different shape from that of Greene which it claims to generalise. I'll have a ponder. | |
| Oct 10, 2018 at 12:49 | comment | added | pi66 | @BenBarber At most $i-1$ points of the first $k$-set are in the second $k$-set's hemisphere, and vice versa. Doesn't that make for $2i-2$ points available for intersection? | |
| Oct 10, 2018 at 7:37 | comment | added | pi66 | @ArseniyAkopyan Why can't they be in the other hemisphere? | |
| Oct 10, 2018 at 6:59 | comment | added | Arseniy Akopyan | i-1 points are not on a hemisphere, there are on a hypersphere, a sphere of codimension 1. | |
| Oct 9, 2018 at 20:49 | history | edited | YCor |
edited tags
|
|
| Oct 9, 2018 at 19:01 | history | asked | pi66 | CC BY-SA 4.0 |