Timeline for Is there a combinatorial reason for variable-independence of this binomial-coefficient identity?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Dec 6, 2020 at 17:40 | vote | accept | T. Amdeberhan | ||
| Dec 4, 2020 at 1:17 | history | became hot network question | |||
| Dec 3, 2020 at 21:43 | history | edited | Martin Sleziak |
edited tags
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| Dec 3, 2020 at 20:53 | answer | added | Pietro Majer | timeline score: 3 | |
| Dec 3, 2020 at 18:53 | history | edited | T. Amdeberhan | CC BY-SA 4.0 |
edited title
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| Dec 3, 2020 at 17:53 | answer | added | Sean Eberhard | timeline score: 6 | |
| Dec 3, 2020 at 17:38 | history | edited | LSpice | CC BY-SA 4.0 |
A little explanation of 'this' in title
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| Dec 3, 2020 at 17:35 | comment | added | Ofir Gorodetsky | This is ('negative') Chu-Vandermonde, as the LHS is $(-1)^{R-t} \sum_n \binom{-\ell -1}{n}\binom{\ell-t-1}{R-t-n} =(-1)^{R-t} \binom{-t-2}{R-t}=\binom{R+1}{t+1}$. | |
| Dec 3, 2020 at 17:13 | history | asked | T. Amdeberhan | CC BY-SA 4.0 |