Open Menu
AllLocalCommunitiesAbout
lotide
AllLocalCommunitiesAbout
Login

identity theft

⁨597⁩ ⁨likes⁩

Submitted ⁨⁨2⁩ ⁨months⁩ ago⁩ by ⁨fossilesque@lemmy.dbzer0.com⁩ to ⁨science_memes@mander.xyz⁩

https://lemmy.dbzer0.com/pictrs/image/e3c71cee-8aa6-4b17-8e1b-4f47380634c6.webp

source

Comments

Sort:hotnewtop
  • neidu3@sh.itjust.works ⁨2⁩ ⁨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.

    source
    • zqwzzle@lemmy.ca ⁨2⁩ ⁨months⁩ ago

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

      source
    • lugal@lemmy.dbzer0.com ⁨2⁩ ⁨months⁩ ago

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

      source
    • Gustephan@lemmy.world ⁨2⁩ ⁨months⁩ ago

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

      source
    • pseudo@jlai.lu ⁨2⁩ ⁨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.

      source
      • fallingcats@discuss.tchncs.de ⁨2⁩ ⁨months⁩ ago

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

        source
        • -> View More Comments
    • Saleh@feddit.org ⁨2⁩ ⁨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/

      source
  • MichaelScotch@lemmy.world ⁨2⁩ ⁨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”

    source
    • subtext@lemmy.world ⁨2⁩ ⁨months⁩ ago

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

      source
      • MichaelScotch@lemmy.world ⁨2⁩ ⁨months⁩ ago

        Well done sir, well done… I mean dude

        source
  • pseudo@jlai.lu ⁨2⁩ ⁨months⁩ ago

    Thank you OP!

    source
  • NocturnalMorning@lemmy.world ⁨2⁩ ⁨months⁩ ago

    At least they’re symmetric.

    source
  • Trollception@sh.itjust.works ⁨2⁩ ⁨months⁩ ago

    Uhh who’s joking about identify theft?

    source
    • Akasazh@feddit.nl ⁨2⁩ ⁨months⁩ ago

      Your username is incredibly apt here

      source