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For $A, B$ $n$-dimensional square(or hyper-cube) matrices $$AB = \sum_{\phi\in\Phi} \otimes(A,B)$$ where $$ \Phi =\{\phi | \phi=(\overbrace{\text{False},\underbrace{x_1,\dots,x_{(2n-2)}}_{\text{$n$ Trues and $n-2$ Falses}},\text{False}}^{\text{2$n$ terms}})\} $$ $\otimes$ is the outer product, the $\phi$ are buntings as defined in http://tamivox.org/redbear/gen_matrix_mult/index.html, and each $x_i$ is either True or False
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Sat, 11 May 2019 15:23 GMT