An analogue of Hilbert's Syzygy Theorem for the algebra of one-sided inverses of a polynomial algebra

Details An analogue of Hilbert's Syzygy Theorem for the algebra of one-sided inverses of a polynomial algebra An analogue of Hilbert's Syzygy Theorem for the algebra of one-sided inverses of a polynomial algebra

2010-06-02

arxiv.org/abs/1006.0455v2

Mathematics

Rings and Algebras

8 pages

Scientific paper

An analogue of Hilbert's Syzygy Theorem is proved for the algebra $\mS_n (A)$ of one-sided inverses of the polynomial algebra $A[x_1, ..., x_n]$ over an arbitrary ring $A$: $$ \lgldim (\mS_n(A))= \lgldim (A) +n.$$ The algebra $\mS_n(A)$ is noncommutative, neither left nor right Noetherian and not a domain. The proof is based on a generalization of the Theorem of Kaplansky (on the projective dimension) obtained in the paper. As a consequence it is proved that for a left or right Noetherian algebra $A$: $$ \wdim (\mS_n(A))= \wdim (A) +n.$$

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