identity theft
identity theft
18 comments
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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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Bernstein bears
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I believe it’s actually, “dude, this is a Wendy’s restaurant.” Check and mate.
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Well done sir, well done… I mean dude
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Thank you OP!
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Uhh who's joking about identify theft?
18 comments
Could one of you scholars please explain the joke for us smoothbrains who don't get it? All I see is a boolean matrix, and I'm not even sure that is correct.
A square matrix with the ones in the diagonal is called the identity matrix
It's an identity matrix. You multiple a vector with it and the result is still the same (identical) vector
Eigen see how this is confusing, I don't get it either
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:
x times 1 is x.
anyMatrix times Identity is anyMatrix.
Wouldn't you need to put
anyMatrixfirst, since matrix multiplication isn't commutative?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: https://www.geeksforgeeks.org/identity-matrix/
It's like if you multiply or divide by one. Just a bit bigger cuz linear algebra.