Thanks for the response :)
I got it solved since then, I had trouble trying to convert the double inner product as
a summation. Once I figured that out, it was as easy as pie
Homework Statement
using Einstein notation, show the following identities are true
(A · B) : C = A^T · C : B = C · B^T : A
Homework Equations
The Attempt at a Solution
(A · B) : C=(A_{ij} · B_{jk} ) : C
= D_{ik} C_{ik}
= C_{ik} D_{ik}...