We use transference methods
to give a new proof for Bochner’s abstract generalization of the M. Riesz
Theorem on conjugate harmonic functions. The proof makes direct use of the
classical Hilbert transform, providing it with a structural role in the abstract
setting. The norm of the classical Hilbert transform is thereby shown to be
the least admissible bound in the abstract theorem. Analogous results are
obtained for certain classical multiplier transforms related to the Hilbert
transform.