EjrALGpescalar01

Recordemos que en $\mathcal{M}_n(\mathbb{R})$, definimos: $A\bullet B=\text{tr}(B^tA)$

(%i3)

A : matrix([ 1, 2],[ 0, - 1]) $
B : matrix([ 0, - 1],[ 1, 3]) $
print( A, "\$\\bullet\$", B, "=", mat_trace( transpose( B). A)) $

\begin{matrix} [\begin{matrix} 1 & 2 \\ 0 & - 1 \end{matrix}] \(\bullet\) [\begin{matrix} 0 & - 1 \\ 1 & 3 \end{matrix}] = - 5 \end{matrix}

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