The Kronecker delta, ( \delta^i_j ), is 1 if ( i=j ) and 0 otherwise. It represents the identity map.
$$ I_{11} = m (r^2 \delta_{11} - r_1 r_1) = 2 (5 \cdot 1 - 1 \cdot 1) = 2(5 - 1) = 2(4) = 8 $$ ejercicios con tensores
El tensor resultante es: $$ C = \begin{pmatrix} 2 & 5 \ 1 & 1 \end{pmatrix} $$ The Kronecker delta, ( \delta^i_j ), is 1
The Kronecker delta, ( \delta^i_j ), is 1 if ( i=j ) and 0 otherwise. It represents the identity map.
$$ I_{11} = m (r^2 \delta_{11} - r_1 r_1) = 2 (5 \cdot 1 - 1 \cdot 1) = 2(5 - 1) = 2(4) = 8 $$
El tensor resultante es: $$ C = \begin{pmatrix} 2 & 5 \ 1 & 1 \end{pmatrix} $$