Timeline for Is this similar to a known combinatorial identity?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Jul 15, 2013 at 20:20 | vote | accept | CommunityBot | moved from User.Id=5117 by developer User.Id=36770 | |
| Jul 12, 2013 at 14:20 | comment | added | user5117 | Wow, thanks! As per D. Lehavi's suggestion I tried to use Wilf--Zeilberger-based computer programs to solve the problem; I failed, but an expert --- Christoph Koutschan --- was able to do this successfully. It's satisfying to see things worked out by hand, though! | |
| Jul 12, 2013 at 3:32 | comment | added | Zack Wolske | I wondered if it was only known as that in Canada, but I looked it up and found some results, so I used it. $\sum_{j=0}^i \binom{n+j}{j} = \binom{n+i+1}{i}$, because the relevant terms in Pascal's triangle look like a hockey stick. | |
| Jul 12, 2013 at 2:41 | comment | added | Gerry Myerson | "The hockey stick identity"? | |
| Jul 12, 2013 at 2:05 | history | answered | Zack Wolske | CC BY-SA 3.0 |