Given a general second tensor rank tensor A_(i j) and a metric g_(i j), define θ | congruent | A_(i j) g^(i j) = A_i^i ω^i | congruent | ϵ^(i j k) A_(j k) σ_(i j) | congruent | 1/2(A_(i j) + A_(j i)) - 1/3 g_(i j) A_k^k, where δ_(i j) is the Kronecker delta and ϵ^(i j k) is the permutation symbol.