Timeline for martingales, stochastic processes
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| Feb 19, 2016 at 0:13 | comment | added | Navy | I see, $C_{n}^{0}=1$. But I think it is hard to calculate d=n, as I tried, with no answer. | |
| Feb 19, 2016 at 0:06 | history | edited | Aksakal | CC BY-SA 3.0 |
added 262 characters in body
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| Feb 18, 2016 at 23:21 | comment | added | Aksakal | @Navy Plug $x=1$ directly to the sum to see that your formula is incorrect. | |
| Feb 18, 2016 at 23:09 | comment | added | Navy | I think $\sum_{y=0}^2 y \binom{2 x}{y}\binom{4-2 x}{2-y} = 6 x$ is incorrect. What i get is $\sum_{y=0}^2 y \binom{2 x}{y}\binom{4-2 x}{2-y} = 8x-4x^2$. And I think taking this method is a bit tough, because it is hard to calculate d=n. Is there any other method? | |
| Feb 18, 2016 at 22:45 | history | edited | Aksakal | CC BY-SA 3.0 |
edited body
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| Feb 18, 2016 at 22:42 | comment | added | Aksakal | Yes, do ask, but also show your work. Read the description of self study tag, it explains how to ask for help with home works | |
| Feb 18, 2016 at 22:39 | comment | added | Navy | Hi, Aksakal. Can I ask homework question with tag self-study? Or would Stack Exchange be pleased with that? | |
| Feb 17, 2016 at 0:37 | history | answered | Aksakal | CC BY-SA 3.0 |