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> If the mere sight of the above is like a punch in the face for you, don't worry. I'm not going to math you to death in what follows. I will only remind you of a tiny basic part of it that I think relates to languages.

Yes, that mathematical expression is like a punch in my face, but not for the reason you think. I am offended that the rank of the matrix does not match the dimension of the matrix, not that I'm seeing a matrix.



You probably mean that the size of the matrix is incompatible with the size of the vector?


Yes, and embarrassingly there are two mistakes in the comment! I used "rank" of the matrix rather than dimension too.


It's a 3x3 matrix with 3 independent rows. The rank matches the dimension.


He probably meant to say "vector" the second time he said "matrix".




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