Abstract
Covariant lagrangian formulation for free bosonic massless
fields of arbitrary mixed-symmetry type in (A)dSd space-time is
presented. The analysis is based on the frame-like formulation of
higher-spin field dynamics [1] with higher-spin fields
described as p-forms taking values in appropriate modules of the
(A)dSd algebra. The problem of finding free field action is
reduced to the analysis of an appropriate differential complex, with
the derivation 
associated with the variation of the
action. The constructed action exhibits additional gauge symmetries
in the flat limit in agreement with the general structure of gauge
symmetries for mixed-symmetry fields in Minkowski and (A)dSd
spaces.
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