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  2. Android Lollipop - Wikipedia

    en.wikipedia.org/wiki/Android_Lollipop

    Android Lollipop (codenamed Android L during development) is the fifth major version of the Android mobile operating system developed by Google and the 12th version of Android, spanning versions between 5.0 and 5.1.1.

  3. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Adaptive Multi-Rate ACELP (Algebraic Code Excited Linear Prediction) Codec, commonly audio format with GSM cell phones. 23 21 53 49 4C 4B 0A #!SILK␊ 0 sil Audio compression format developed by Skype 23 3F 52 41 44 49 41 4E 43 45 0A #?RADIANCE␊ 0 hdr Radiance High Dynamic Range image file 23 40 7E 5E #@~^ 0 vbe VBScript Encoded script 0D F0 ...

  4. Discrete Fourier transform - Wikipedia

    en.wikipedia.org/wiki/Discrete_Fourier_transform

    The ordinary product expression for the coefficients of c involves a linear (acyclic) convolution, where indices do not "wrap around." This can be rewritten as a cyclic convolution by taking the coefficient vectors for a ( x ) and b ( x ) with constant term first, then appending zeros so that the resultant coefficient vectors a and b have ...

  5. Eigendecomposition of a matrix - Wikipedia

    en.wikipedia.org/wiki/Eigendecomposition_of_a_matrix

    Let A be a square n × n matrix with n linearly independent eigenvectors q i (where i = 1, ..., n).Then A can be factored as = where Q is the square n × n matrix whose i th column is the eigenvector q i of A, and Λ is the diagonal matrix whose diagonal elements are the corresponding eigenvalues, Λ ii = λ i.

  6. Reductive group - Wikipedia

    en.wikipedia.org/wiki/Reductive_group

    A fundamental example of a reductive group is the general linear group of invertible n × n matrices over a field k, for a natural number n. In particular, the multiplicative group G m is the group GL (1), and so its group G m ( k ) of k -rational points is the group k * of nonzero elements of k under multiplication.

  7. Dependent type - Wikipedia

    en.wikipedia.org/wiki/Dependent_type

    In computer science and logic, a dependent type is a type whose definition depends on a value. It is an overlapping feature of type theory and type systems.In intuitionistic type theory, dependent types are used to encode logic's quantifiers like "for all" and "there exists".

  8. Actor model - Wikipedia

    en.wikipedia.org/wiki/Actor_model

    The actor model in computer science is a mathematical model of concurrent computation that treats an actor as the basic building block of concurrent computation. In response to a message it receives, an actor can: make local decisions, create more actors, send more messages, and determine how to respond to the next message received.

  9. John von Neumann - Wikipedia

    en.wikipedia.org/wiki/John_von_Neumann

    Later, von Neumann suggested a new method of linear programming, using the homogeneous linear system of Paul Gordan (1873), which was later popularized by Karmarkar's algorithm. Von Neumann's method used a pivoting algorithm between simplices , with the pivoting decision determined by a nonnegative least squares subproblem with a convexity ...