Refined Algebraic Quantization of Constrained Systems with Structure Functions

The method of refined algebraic quantization of constrained systems which is based on modification of the inner product of the theory rather than on imposing constraints on the physical states is generalized to the case of constrained systems with structure functions and open gauge algebras. A new prescription for inner product for the open-algebra systems is suggested. It is illustrated on a simple example. The correspondence between refined algebraic and BRST-BFV quantizations is investigated for the case of nontrivial structure functions.