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The role of Gröbner bases in the study of extremal truncated moment problems
Journal article   Open access   Peer reviewed

The role of Gröbner bases in the study of extremal truncated moment problems

Raúl E. Curto and Marc R. Moore
Journal of mathematical analysis and applications, Vol.567(1), 131113
10/05/2026
DOI: 10.1016/j.jmaa.2026.131113
url
https://doi.org/10.1016/j.jmaa.2026.131113View
Published (Version of record) Open Access

Abstract

In a 2014 paper, R.E. Curto and S. Yoo proved that a moment matrix M(3) with specific harmonic polynomials as column relations admits a representing measure if and only if a condition at the level of moments holds. In this paper, we generalize the 2014 result to arbitrary moment matrices M(k) (k∈Z+), with column relations given by general harmonic polynomials. We accomplish this by proving that the Gröbner basis for the ideal generated by a finite variety associated with the moment matrix provides all the necessary column relations for the matrix as well as a suitable condition on the moments, which is equivalent to the existence of a representing measure.
Truncated complex moment problem Column relations Algebraic variety Gröbner basis Harmonic polynomial

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