On primary decomposition of Hermite projectors
| Autor: | Shekhtman, Boris, Tuesink, Brian |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | An ideal projector on the space of polynomials $\mathbb{C} [\mathbf{x}]=\mathbb{C} [x_{1},\ldots ,x_{d}]$ is a projector whose kernel is an ideal in $\mathbb{C}[ \mathbf{x}]$. The question of characterization of ideal projectors that are limits of Lagrange projector was posed by Carl de Boor. In this paper we make a contribution to this problem. Every ideal projector $P$ can be written as a sum of ideal projector $\sum P^{(k)}$ $\ $such that $\cap \ker P^{(k)}$ is a primary decomposition of the ideal $\ker P$. We show that $P$ is a limit of Lagrange projectors if and only if each $P^{(k)}$ is. As an application we construct an ideal projector $P$ whose kernel is a symmetric ideal, yet $P$ is not a limit of Lagrange projectors. Comment: This article has been withdrawn by arXiv administrators due to an unresolvable authorship dispute |
| Databáze: | arXiv |
| Externí odkaz: |
|