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Random permutation information


A random permutation is a random ordering of a set of objects, that is, a permutation-valued random variable. The use of random permutations is often fundamental to fields that use randomized algorithms such as coding theory, cryptography, and simulation. A good example of a random permutation is the shuffling of a deck of cards: this is ideally a random permutation of the 52 cards.

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Random permutation

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A random permutation is a random ordering of a set of objects, that is, a permutation-valued random variable. The use of random permutations is often fundamental...

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Random permutation statistics

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The statistics of random permutations, such as the cycle structure of a random permutation are of fundamental importance in the analysis of algorithms...

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Permutation

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In mathematics, a permutation of a set can mean one of two different things: an arrangement of its members in a sequence or linear order, or the act or...

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Discrete uniform distribution

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over any finite set. For instance, a random permutation is a permutation generated uniformly from the permutations of a given length, and a uniform spanning...

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Random oracle

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indistinguishable from those of a random permutation. In the ideal permutation model, an additional oracle access is given to the ideal permutation and its inverse. The...

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Quicksort

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x_{n})} is a random permutation, ( x 1 , x 2 , … , x j , x i ) {\displaystyle (x_{1},x_{2},\ldots ,x_{j},x_{i})} is also a random permutation, so the probability...

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Pseudorandom permutation

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pseudorandom permutation (PRP) is a function that cannot be distinguished from a random permutation (that is, a permutation selected at random with uniform...

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Permutation test

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A permutation test (also called re-randomization test or shuffle test) is an exact statistical hypothesis test making use of the proof by contradiction...

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Random binary tree

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application it is common to use random trees formed by inserting nodes one at a time according to a random permutation. The resulting trees are very likely...

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Random forest

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random forests, in particular: Using out-of-bag error as an estimate of the generalization error. Measuring variable importance through permutation....

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Bogosort

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deterministic version that enumerates all permutations until it hits a sorted one, and a randomized version that randomly permutes its input. An analogy for...

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100 prisoners problem

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cycle of the permutation has a length of at most 50. Their survival probability is therefore equal to the probability that a random permutation of the numbers...

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Maximal independent set

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C.-W.; Chen, G.-H. (1993), "Generate all maximal independent sets in permutation graphs", Internat. J. Comput. Math., 47 (1–2): 1–8, doi:10.1080/00207169308804157...

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MinHash

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where the hash function used is assumed to have pseudo-random properties, the random permutation would not be used.) Now, applying hmin to both A and B...

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Perlin noise

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specific permutation is not absolutely required, though it does require a randomized array of the integers 0 to 255. If creating a new permutation table...

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Random number

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variate Random real Richard Durstenfeld (July 1964). "Algorithm 235: Random permutation". Communications of the ACM (Association for Computing Machinery)...

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List of permutation topics

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mathematical permutations. Alternating permutation Circular shift Cyclic permutation Derangement Even and odd permutations—see Parity of a permutation Josephus...

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Permutation matrix

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entries 0.: 26  An n × n permutation matrix can represent a permutation of n elements. Pre-multiplying an n-row matrix M by a permutation matrix P, forming PM...

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Block cipher

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the difference between the block cipher (equipped with a random key) and a random permutation. To be a bit more precise, let E be an n-bit block cipher...

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Permutational analysis of variance

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significance by comparing the actual F test result to that gained from random permutations of the objects between the groups. Moreover, whilst PERMANOVA tests...

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Stirling numbers of the second kind

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Dobiński's formula). Let the random variable X be the number of fixed points of a uniformly distributed random permutation of a finite set of size m. Then...

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American flag sort

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share very long prefixes. Most critically, this algorithm follows a random permutation, and is thus particularly cache-unfriendly for large datasets.[user-generated...

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Longest increasing subsequence

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of independent random variables with continuous distribution F {\displaystyle F} – or alternatively the elements of a random permutation – are presented...

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Cycle index

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which is structured in such a way that information about how a group of permutations acts on a set can be simply read off from the coefficients and exponents...

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Shuffling

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sort the cards in order of their random numbers. This will generate a random permutation, unless any of the random numbers generated are the same as...

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