Order of a Permutation
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Find the order of sigma^1000, where sigma is the permutation (123456789)
(378945216)
Find the order of , where is the permutation .
Solution. Since and . Let , we have
where k, m and n are positive integers.
So,
So, the order of is 3.
I got this solution but I don't understand why the permutation raised to the 1000 power=(138). Why do the other elements just map to themselves? Can you elaborate on this anymore. Also why is it necessary to put 1000= 333*3+1 = 500 * 2 = 250 * 4.
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The order of a permutation is found. The solution is detailed and well presented.
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Find the order of , where is the permutation .
Solution. Since and . Let , we have
where k, m and n are positive integers.
So,
So, the order of is 3.
I got this solution but I don't understand why the permutation raised to the 1000 ...
Education
- BSc , Wuhan Univ. China
- MA, Shandong Univ.
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- "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
- "excellent work"
- "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
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