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It's a heroic attempt at proof-by-emoji, but I'm not convinced it's clearer than the direct proof, ie. (AB)^T_ij = sum_k blah blah ... = (B^T A^T)_ij
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This one still better than the the above.
End of conversation
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QEmojiD
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This was disproven years ago by Givno Fuchs of Utrecht (1925-1986) when he substituted bocce balls for the basketballs and ripe mangoes for the soccer balls. Not only are A and B NOT matrices, but they are no longer A and B. They are
and
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This took me way too long to understand and gave me a headache
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This is at best a emoji hint for the proof. Which is only useful if you could actually understand the proper proof.
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-Aᵀ,
-A 
-Bᵀ,
-(AB)ᵀ \ 