Generalized Einstein Operator Generating Functions

We present gauge invariant, self adjoint Einstein operators for mixed symmetry higher spin theories. The result applies to multi-forms, multi-symmetric forms and mixed antisymmetric and symmetric multiforms. It also yields explicit action principles for these theories in terms of their minimal covariant field content. For known cases, these actions imply the mixed symmetry equations of motion of Labastida. The result is based on a calculus for handling normal ordered operator expressions built from quantum generators of the underlying constraint algebras. The dynamics of higher spin fields is described by the equation of motion ( ∆−QQi + 1 2 QQtrji } {{ } G ) Ψ = 0 = tri(jtrkm]Ψ , (1) which enjoys the gauge invariance