The product $x^Tx$ is called the inner product. Is there a name for the matrix $xx^T$? I want to be able to read about it but I don't know what to search on.
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3$x y^T$ is called the "outer product" of $x$ and $y$. – littleO Dec 22 '22 at 09:44
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2It's what you would guess first; $xy^T$ is called the outer product. – Christian E. Ramirez Dec 22 '22 at 09:44
