Abstract
A lattice-theoretic approach to Koszulity is well known. This paper gives a lattice-theoretic approach to polynomiality, i.e., existence of a P.B.W. basis in Priddy's sense. This provides a straightforward proof for Priddy's theorem. Polynomiality is interpreted in terms of confluence in noncommutative computational algebra. The basic notion of a reduction operator is investigated in some detail. The reduction algebras are introduced to study the confluence of two reduction operators in terms of representation theory. The meet and the join of two reduction operators are constructed in an algorithmic way. A geometric characterization of the confluence is obtained.
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