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- W2951437772 abstract "The Strang-Fix conditions are necessary and sufficient to reproduce spaces of algebraic polynomials up to some degree by integer shifts of compactly supported functions. W. Dahmen and Ch. Micchelli (Linear Algebra Appl. 52/3:217-234, 1983) introduced a generalization of the Strang-Fix conditions to affinely invariant subspaces of higher degree polynomials. C. de Boor (Constr. Approx. 3:199-208, 1987) raised a question on the necessity of scale-invariance of polynomial space for an arbitrary function; and he omitted the scale-invariance restriction on the space. In the paper, we present a matrix approach to determine (not necessarily scale-invariant) polynomial space contained in the span of integer shifts of a compactly supported function. Also, in the paper, we consider scaling functions that we call the elliptic scaling functions (Int. J. Wavelets Multiresolut. Inf. Process. To appear); and, using the matrix approach, we prove that the elliptic scaling functions satisfy the generalized Strang-Fix conditions and reproduce only affinely invariant polynomial spaces. Namely we prove that any algebraic polynomial contained in the span of integer shifts of a compactly supported elliptic scaling function belongs to the null-space of a homogeneous elliptic differential operator. However, in the paper, we present nonstationary elliptic scaling functions such that the scaling functions reproduce not scale-invariant (only shift-invariant) polynomial spaces." @default.
- W2951437772 created "2019-06-27" @default.
- W2951437772 creator A5082238734 @default.
- W2951437772 date "2013-10-31" @default.
- W2951437772 modified "2023-09-27" @default.
- W2951437772 title "Polynomial spaces reproduced by elliptic scaling functions" @default.
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