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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.
Eigen see how this is confusing, I don’t get it either
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
It’s like if you multiply or divide by one. Just a bit bigger cuz linear algebra.