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  2. CYK algorithm - Wikipedia

    en.wikipedia.org/wiki/CYK_algorithm

    The node is linked to the array elements that were used to produce it, so as to build the tree structure. Only one such node in each array element is needed if only one parse tree is to be produced. However, if all parse trees of an ambiguous sentence are to be kept, it is necessary to store in the array element a list of all the ways the ...

  3. Quadratic residue code - Wikipedia

    en.wikipedia.org/wiki/Quadratic_residue_code

    Its generator polynomial as a cyclic code is given by f ( x ) = ∏ j ∈ Q ( x − ζ j ) {\displaystyle f(x)=\prod _{j\in Q}(x-\zeta ^{j})} where Q {\displaystyle Q} is the set of quadratic residues of p {\displaystyle p} in the set { 1 , 2 , … , p − 1 } {\displaystyle \{1,2,\ldots ,p-1\}} and ζ {\displaystyle \zeta } is a primitive p ...

  4. Free monoid - Wikipedia

    en.wikipedia.org/wiki/Free_monoid

    A set of free generators for a free monoid P is referred to as a basis for P: a set of words C is a code if C* is a free monoid and C is a basis. [3] A set X of words in A ∗ is a prefix, or has the prefix property, if it does not contain a proper (string) prefix of any of its elements. Every prefix in A + is a code, indeed a prefix code. [3] [13]

  5. Polynomial code - Wikipedia

    en.wikipedia.org/wiki/Polynomial_code

    In a polynomial code over () with code length and generator polynomial () of degree , there will be exactly code words. Indeed, by definition, p ( x ) {\displaystyle p(x)} is a code word if and only if it is of the form p ( x ) = g ( x ) ⋅ q ( x ) {\displaystyle p(x)=g(x)\cdot q(x)} , where q ( x ) {\displaystyle q(x)} (the quotient ) is of ...

  6. Fibonacci heap - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_heap

    [1] [2] Deleting an element (most often used in the special case of deleting the minimum element) works in (⁡) amortized time, where is the size of the heap. [2] This means that starting from an empty data structure, any sequence of a insert and decrease-key operations and b delete-min operations would take O ( a + b log ⁡ n ...

  7. BCH code - Wikipedia

    en.wikipedia.org/wiki/BCH_code

    The BCH code over () and generator polynomial () with successive powers of as roots is one type of Reed–Solomon code where the decoder (syndromes) alphabet is the same as the channel (data and generator polynomial) alphabet, all elements of (). [6]

  8. 2–3 tree - Wikipedia

    en.wikipedia.org/wiki/2–3_tree

    T is a 2-node with data element a. If T has left child p and right child q, then p and q are 2–3 trees of the same height; a is greater than each element in p; and; a is less than each data element in q. T is a 3-node with data elements a and b, where a < b. If T has left child p, middle child q, and right child r, then p, q, and r are 2–3 ...

  9. Xorshift - Wikipedia

    en.wikipedia.org/wiki/Xorshift

    An xorshift* generator applies an invertible multiplication (modulo the word size) as a non-linear transformation to the output of an xorshift generator, as suggested by Marsaglia. [1] All xorshift* generators emit a sequence of values that is equidistributed in the maximum possible dimension (except that they will never output zero for 16 ...