Andrew Sell

A Deffiniton of Matrix Multiplication

Basically...

$A\in {\mathbb{ℝ}}^{m\times n}$, $B\in {\mathbb{ℝ}}^{n\times p}$

Turns into...

$(AB)\in {\mathbb{ℝ}}^{m\times p}$

Where $AB$ are magically

$(AB{)}_{i,j}=\sum _{r=1}^n{A}_{i,r}{B}_{r,j}$

Make sense?...

Joking Aside

Does anyone know whats going on?