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  2. Parity-check matrix - Wikipedia

    en.wikipedia.org/wiki/Parity-check_matrix

    Formally, a parity check matrix H of a linear code C is a generator matrix of the dual code, C ⊥. This means that a codeword c is in C if and only if the matrix-vector product Hc ⊤ = 0 (some authors [1] would write this in an equivalent form, cH ⊤ = 0.) The rows of a parity check matrix are the coefficients of the parity check equations. [2]

  3. Telegram (software) - Wikipedia

    en.wikipedia.org/wiki/Telegram_(software)

    Telegram Messenger, commonly known as Telegram, is a cloud-based, encrypted, cross-platform, instant messaging (IM) service. It was originally launched for iOS on 14 August 2013 and Android on 20 October 2013.

  4. Twitch (service) - Wikipedia

    en.wikipedia.org/wiki/Twitch_(service)

    Twitch is an American video live-streaming service that focuses on video game live streaming, including broadcasts of esports competitions, in addition to offering music broadcasts, creative content, and "in real life" streams.

  5. Empress (cracker) - Wikipedia

    en.wikipedia.org/wiki/Empress_(cracker)

    Empress (sometimes stylized EMPRESS) is a video game cracker who specializes in breaking anti-piracy software.While the true identity of Empress is unknown, she refers to herself as a young Russian woman.

  6. 2022–2023 Pentagon document leaks - Wikipedia

    en.wikipedia.org/wiki/2022–2023_Pentagon...

    In April 2023, two sets of leaked classified foreign intelligence documents of the United States began circulating on Twitter, Telegram, and 4chan. Jack Teixeira, an airman first class of the Massachusetts Air National Guard, had allegedly photographed printouts of the documents at his parents' home in Dighton, Massachusetts, and posted them to the instant messaging platform Discord on a ...

  7. Hadamard matrix - Wikipedia

    en.wikipedia.org/wiki/Hadamard_matrix

    Let H be a Hadamard matrix of order n.The transpose of H is closely related to its inverse.In fact: = where I n is the n × n identity matrix and H T is the transpose of H.To see that this is true, notice that the rows of H are all orthogonal vectors over the field of real numbers and each have length .

  8. Messenger (software) - Wikipedia

    en.wikipedia.org/wiki/Messenger_(software)

    Messenger, [11] also known as Facebook Messenger, is an American proprietary instant messaging service developed by Meta Platforms.Originally developed as Facebook Chat in 2008, the client application of Messenger is currently available on iOS and Android mobile platforms, Windows and macOS desktop platforms, through the Messenger.com web application, and on the standalone Facebook Portal ...

  9. Singleton bound - Wikipedia

    en.wikipedia.org/wiki/Singleton_bound

    The linear independence of the columns of a generator matrix of an MDS code permits a construction of MDS codes from objects in finite projective geometry. Let P G ( N , q ) {\displaystyle PG(N,q)} be the finite projective space of (geometric) dimension N {\displaystyle N} over the finite field F q {\displaystyle \mathbb {F} _{q}} .