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permutation product

См. также в других словарях:

  • Permutation — For other uses, see Permutation (disambiguation). The 6 permutations of 3 balls In mathematics, the notion of permutation is used with several slightly different meanings, all related to the act of permuting (rearranging) objects or values.… …   Wikipedia

  • Permutation matrix — In mathematics, in matrix theory, a permutation matrix is a square (0,1) matrix that has exactly one entry 1 in each row and each column and 0 s elsewhere. Each such matrix represents a specific permutation of m elements and, when used to… …   Wikipedia

  • Permutation group — In mathematics, a permutation group is a group G whose elements are permutations of a given set M , and whose group operation is the composition of permutations in G (which are thought of as bijective functions from the set M to itself); the… …   Wikipedia

  • Permutation City — infobox Book | name = Permutation City title orig = translator = image caption = Cover of first edition (hardcover) author = Greg Egan illustrator = cover artist = country = Australia language = English series = genre = Science fiction novel… …   Wikipedia

  • permutation group — noun : a group of which the elements are permutations and in which the product of two permutations is a permutation whose effect is the same as the successive application of the first two * * * a mathematical group whose elements are permutations …   Useful english dictionary

  • Product cipher — In cryptography, a product cipher is a popular type of block cipher that works by executing in sequence a number of simple transformations such as substitution, permutation, and modular arithmetic. Product ciphers usually consist of iterations of …   Wikipedia

  • permutation group — noun Date: 1904 a group whose elements are permutations and in which the product of two permutations is a permutation whose effect is the same as the successive application of the first two …   New Collegiate Dictionary

  • permutation group — a mathematical group whose elements are permutations and in which the product of two permutations is the same permutation as is obtained by performing them in succession. [1900 05] * * * …   Universalium

  • Permutation box — In cryptography, a permutation box (or P box) is a method of bit shuffling used to permute or transpose bits across S boxes inputs, retaining diffusion while transposing.[1] In block ciphers, the S boxes and P Boxes are used to make the relation… …   Wikipedia

  • Bit-reversal permutation — Product of Gray code permutation and bit reversal permutation (4 bit) (The result permutes a natural ordered into a sequence ordered Hadamard matrix.) In applied mathematics, a bit reversal permutation is a permutation of a sequence with… …   Wikipedia

  • Wreath product — In mathematics, the wreath product of group theory is a specialized product of two groups, based on a semidirect product. Wreath products are an important tool in the classification of permutation groups and also provide a way of constructing… …   Wikipedia

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