identity theft

Comments

• neidu3@sh.itjust.works ⁨10⁩ ⁨months⁩ ago

  Could one of you scholars please explain the joke for us smoothbrains who don’t get it? All I see is a matrix.

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  • zqwzzle@lemmy.ca ⁨10⁩ ⁨months⁩ ago

    A square matrix with the ones in the diagonal is called the identity matrix

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  • lugal@lemmy.dbzer0.com ⁨10⁩ ⁨months⁩ ago

    It’s an identity matrix. You multiple a vector with it and the result is still the same (identical) vector

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  • Gustephan@lemmy.world ⁨10⁩ ⁨months⁩ ago

    Eigen see how this is confusing, I don’t get it either

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  • pseudo@jlai.lu ⁨10⁩ ⁨months⁩ ago

    That matrix of zeros with one in diagonal is called the matrix of identity.
    It is famous because when doing multiplication on matrix or vector, it acts likes 1 on “normal” number: 1 times x is x Identity times anyMatrix is anyMatrix.

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    • fallingcats@discuss.tchncs.de ⁨10⁩ ⁨months⁩ ago

      Wouldn’t you need to put anyMatrix first, since matrix multiplication isn’t commutative?

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  • Saleh@feddit.org ⁨10⁩ ⁨months⁩ ago

    You multiply vectors and matrizes row by column.

    So for any matrix the fitting identity matrix multiplies each row on the relevant position by one and puts it into a column.

    The matrix remains the same.

    See example 5 here: www.geeksforgeeks.org/identity-matrix/

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• MichaelScotch@lemmy.world ⁨10⁩ ⁨months⁩ ago

  Identity theft is not a joke, Jim. Millions of families suffer every year. Also one that the internet gets wrong all the time: “dude, this is a Wendy’s”, not “sir this is a Wendy’s”

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  • subtext@lemmy.world ⁨10⁩ ⁨months⁩ ago

    I believe it’s actually, “dude, this is a Wendy’s restaurant.” Check and mate.

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    • MichaelScotch@lemmy.world ⁨10⁩ ⁨months⁩ ago

      Well done sir, well done… I mean dude

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• pseudo@jlai.lu ⁨10⁩ ⁨months⁩ ago

  Thank you OP!

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• NocturnalMorning@lemmy.world ⁨10⁩ ⁨months⁩ ago

  At least they’re symmetric.

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• Trollception@sh.itjust.works ⁨10⁩ ⁨months⁩ ago

  Uhh who’s joking about identify theft?

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  • Akasazh@feddit.nl ⁨10⁩ ⁨months⁩ ago

    Your username is incredibly apt here

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