I have the quantity: \begin{equation} I= \sum_{i>j=1}^n \left( a_i b_j -a_j b_i \right)^2, \end{equation} where $a_i, b_i$ are real numbers.
In the case of $n=3$, I can interpret this as the magnitude of the vector resulting from the cross product of the two vectors in $\mathbb{R}^3$: $A=(a_1,a_2,a_3)$ and $B=(b_1,b_2,b_3)$, which geometrically, is related to the area of the parallelogram that these two vectors span.
My question is the following: when $n>3$, is there some geometric interpretation of what does this quantity define (if any) in $\mathbb{R}^n$, and more specifically for the vectors defined by $A=(a_1,\ldots,a_n)$ and $B=(b_1,\ldots,b_n)$ in analogy with the $n=3$ case?
Thanks in advance.