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Canonical Basis for Ideals in a Polynomial Domain Over a Commutative Ring with Finite Basis for Ideals
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Let A be a commutative ring with unit element and A[x] denote the ring of polynomials in x with coefficients from A. Hilbert's theorem is : -
If every ideal in A has a finite basis, then every ideal in A[x] also has a finite basis.
The proof of this as given by Van der Waerden in his Moderne Algebra Bd. II gives us no information beyond the fact that every ideal in A [x] has a finite basis. If we just reverse the argument in his proof we will be able to give actually a canonical basis for every ideal in A[x] which will be found to be a powerful tool in several applications.
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