Geodesic
Density Questions for the Truncated Matrix Moment Problem
Canadian journal of mathematics, Tome 49 (1997) no. 4, pp. 708-721

Voir la notice de l'article provenant de la source Cambridge University Press

For a truncated matrix moment problem, we describe in detail the set of positive definite matrices of measures μ in V2n (this is the set of solutions of the problem of degree 2n) for which the polynomials up to degree n are dense in the corresponding space L2(μ). These matrices of measures are exactly the extremal measures of the set Vn.
DOI : 10.4153/CJM-1997-034-5
Mots-clés : 42C05, 4A60 
Duran, Antonio J.; Lopez-Rodriguez, Pedro. Density Questions for the Truncated Matrix Moment Problem. Canadian journal of mathematics, Tome 49 (1997) no. 4, pp. 708-721. doi: 10.4153/CJM-1997-034-5
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