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- W2803949631 abstract "Sylvester doubles sums, introduced first by Sylvester are symmetric expressions of the roots of two polynomials. Sylvester's definition of double sums makes no sense in the presence of multiple roots, since the definition involves denominators that vanish when there are multiple roots. The aim of this paper is to give a new definition of Sylvester double sums making sense in the presence of multiple roots, which coincides with the definition by Sylvester in the case of simple roots, to prove that double sums indexed by $(k,ell)$ are equal up to a constant if they share the same value for $k+ell$, as well a proof of the relationship between double sums and subresultants, i.e. that they are equal up to a constant. In the simple root case, proofs of these properties are already known. The more general proofs given here are using generalized Vandermonde determinants and symmetric multivariate Hermite interpolation as well as an induction on the length of the remainder sequence of $P$ and $Q$." @default.
- W2803949631 created "2018-06-01" @default.
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- W2803949631 date "2020-01-01" @default.
- W2803949631 modified "2023-09-30" @default.
- W2803949631 title "Sylvester double sums, subresultants and symmetric multivariate Hermite interpolation" @default.
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- W2803949631 doi "https://doi.org/10.1016/j.jsc.2019.02.013" @default.
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