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02:55 | | * AnnoDomini will be going to sleep soon. |
02:55 | <@AnnoDomini> | But first, a problem that's beyond me. |
02:57 | <@AnnoDomini> | Given a roll of N six-sided dice, where the highest result counts and every die that came up as 6 adds 1 to the final result (no floating reroll), one wants to achieve at least number M. |
02:58 | <@AnnoDomini> | So a roll of 4 dice, falling 1, 4, 6, 6 would result in 8. |
02:58 | <@AnnoDomini> | How can one calculate the probability of achieving at least number M with N dice? |
02:58 | | * AnnoDomini sleeps. |
02:59 | < Finerty> | for any roll, it's max(rolls) + count(rolls, 6) |
03:00 | < Finerty> | there's only 60M things for 10d6. |
03:02 | < Finerty> | ...even then it's not that hard, let's see. |
03:06 | < Finerty> | at least 2 to at least 6 is 1 - ((M-1)/6)**N |
03:08 | < Finerty> | At least 7 on up is a bit harder... hmmm... |
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03:45 | < Finerty> | To get exactly, it's (M-6) choose N * 5**(M+N-6) |
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19:40 | < Vornicus> | Arg. CONCENTRATE |
19:41 | | * AnnoDomini starts cooking bacon in front of Vornicus. |
19:41 | < Vornicus> | baaaacoooon |
19:45 | <@EvilDarkLord> | You're getting enough sleep, right Vorn? |
19:45 | < Vornicus> | Yes. |
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21:11 | <@AnnoDomini> | Hrm. Anyone know what 'function maximalization' might mean in context of using genetic algorithms to achieve it? |
21:18 | <@McM[SanDiego]> | You have some function f(x) |
21:18 | | You're now known as TheWatcher |
21:18 | <@AnnoDomini> | Yeah. |
21:18 | <@McM[SanDiego]> | You want to find an x such that f(x) is the largest valus possible. |
21:18 | <@McM[SanDiego]> | So, for f(x) = 3-x^2, for instance, you want it to find 0. |
21:18 | <@McM[SanDiego]> | value, not valus |
21:19 | <@AnnoDomini> | Oh... so I find the argument value which are subjected to a specific function and try to find when the result is highest? |
21:20 | <@McM[SanDiego]> | Yes. Gets more interesting when the function has local maxima that are not the best (think a complicated polynomial) or if there are lots of variables so that the search space is enormous. |
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--- Log closed Wed Jan 02 00:00:12 2008 |