Khatri-Rao Product

$$ \mathbf{A} \ast \mathbf{B} = \left(\mathbf{A}_{ij} \otimes \mathbf{B}_{ij}\right)_{ij} $$

Planted: by ;

References:
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L Ma (2019). 'Khatri-Rao Product', Datumorphism, 06 April. Available at: https://datumorphism.leima.is/cards/math/khatri-rao/.