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Journal Articles Archiv der Mathematik Year : 2009

A Sparse Flat Extension Theorem for Moment Matrices

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Monique Laurent
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Bernard Mourrain

Abstract

In this note we prove a generalization of the flat extension theorem of Curto and Fialkow for truncated moment matrices. It applies to moment matrices indexed by an arbitrary set of monomials and its border, assuming that this set is connected to 1. When formulated in a basis-free setting, this gives an equivalent result for truncated Hankel operators.
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Dates and versions

inria-00347022 , version 1 (13-12-2008)
inria-00347022 , version 2 (14-12-2008)

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Monique Laurent, Bernard Mourrain. A Sparse Flat Extension Theorem for Moment Matrices. Archiv der Mathematik, 2009, 93, pp.87-98. ⟨10.1007/s00013-009-0007-6⟩. ⟨inria-00347022v2⟩
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