Jisho

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直積 ()
Wikipedia definition
1. Outer productFor "outer product" in geometric algebra, see exterior product. In linear algebra, the outer product typically refers to the tensor product of two vectors. The result of applying the outer product to a pair of vectors is a matrix. The name contrasts with the inner product, which takes as input a pair of vectors and produces a scalar. The outer product of vectors can be also regarded as a special case of the Kronecker product of matrices.
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