Timeline for Sign-reversing involution proof of tree inversion generating function at $-1$ equals number of alternating permutations?
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 17, 2019 at 9:28 | comment | added | Sam Hopkins | Perfect! Thanks! | |
| Oct 17, 2019 at 9:28 | vote | accept | Sam Hopkins | ||
| Oct 17, 2019 at 5:45 | history | answered | Ira Gessel | CC BY-SA 4.0 |