if in a unitary frame, then with k in the s-th place. Other Weitzenböck identities In conformal geometry there is a Weitzenböck formula relating a particular pair of differential operators defined on the tractor bundle. See Branson, T. and Gover, A.R., "Conformally Invariant Operators, Differential Forms, Cohomology and a Generalisation of Q-Curvature", Communications in Partial Differential Equations, 30 (2005) 1611–1669. See also Bochner identity Bochner–Kodaira–Nakano identity Laplacian operators in differential geometry References Mathematical identities Differential operators Differential geometry