Block orthogonal polynomials: I. Definition and properties

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dc.creatorNormand, Jean-Marie
dc.date2006-06-16
dc.date2007-03-12
dc.date.accessioned2026-07-07T07:51:06Z
dc.date.available2026-07-07T07:51:06Z
dc.descriptionConstrained orthogonal polynomials have been recently introduced in the study of the Hohenberg-Kohn functional to provide basis functions satisfying particle number conservation for an expansion of the particle density. More generally, we define block orthogonal (BO) polynomials which are orthogonal, with respect to a first Euclidean scalar product, to a given $i$-dimensional subspace ${\cal E}_i$ of polynomials associated with the constraints. In addition, they are mutually orthogonal with respect to a second Euclidean scalar product. We recast the determination of these polynomials into a general problem of finding particular orthogonal bases in an Euclidean vector space endowed with distinct scalar products. An explicit two step Gram-Schmidt orthogonalization (G-SO) procedure to determine these bases is given. By definition, the standard block orthogonal (SBO) polynomials are associated with a choice of ${\cal E}_i$ equal to the subspace of polynomials of degree less than $i$. We investigate their properties, emphasizing similarities to and differences from the standard orthogonal polynomials. Applications to classical orthogonal polynomials will be given in forthcoming papers.
dc.descriptionThis is a reduced version of the initial manuscript, the number of pages being reduced from 34 to 26
dc.identifierhttps://arxiv.org/abs/math-ph/0606036
dc.identifierhttp://arxiv.org/abs/math-ph/0606036
dc.identifierJ. Phys. A: Math. Theor. 40 (2007) 2341-2369
dc.identifierdoi:10.1088/1751-8113/40/10/009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/125392
dc.subjectMathematical Physics
dc.subject11C08; 15A03; 15A63; 33C45; 33D45; 42C05
dc.titleBlock orthogonal polynomials: I. Definition and properties
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