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Block orthogonal polynomials: I. Definition and properties
Mathematical Physics · Submitted 16 Jun 2006
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim An explicit two step Gram-Schmidt orthogonalization (G-SO) procedure to determine these bases is given.
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The abstract, sentence by sentence
Constrained 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.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Constrained 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. | background 1.00 | 0.06 | 0.06 | asserted 1.00 |
| s1 | 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. | contribution 0.99 | 0.89 | 0.14 | asserted 1.00 |
| s2 | In addition, they are mutually orthogonal with respect to a second Euclidean scalar product. | contribution 0.93 | 0.53 | 0.07 | asserted 1.00 |
| s3 | 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. | contribution 0.71 | 0.90 | 0.16 | asserted 1.00 |
| s4 | An explicit two step Gram-Schmidt orthogonalization (G-SO) procedure to determine these bases is given. | method 0.97 | 0.92 | 0.11 | asserted 1.00 |
| s5 | 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 $i$. | contribution 0.81 | 0.53 | 0.06 | asserted 1.00 |
| s6 | We investigate their properties, emphasizing similarities to and differences from the standard orthogonal polynomials. | contribution 0.97 | 0.89 | 0.11 | asserted 0.70 |
| s7 | Applications to classical orthogonal polynomials will be given in forthcoming papers. | future work 1.00 | 0.09 | 0.03 | asserted 0.82 |
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Original abstract
Constrained 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.
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