An Elementary Proof of Sylvester's Double Sums for Subresultants

Details An Elementary Proof of Sylvester's Double Sums for Subresultants An Elementary Proof of Sylvester's Double Sums for Subresultants

2006-04-19

arxiv.org/abs/math/0604418v2

Mathematics

Commutative Algebra

9 pages, no figures, simpler proof of the main results thanks to useful comments made by the referees. To appear in Journal of

Scientific paper

In 1853 Sylvester stated and proved an elegant formula that expresses the polynomial subresultants in terms of the roots of the input polynomials. Sylvester's formula was also recently proved by Lascoux and Pragacz by using multi-Schur functions and divided differences. In this paper, we provide an elementary proof that uses only basic properties of matrix multiplication and Vandermonde determinants.

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