Partial Sums of Orthonormal Bases Preserving Positivity - and Martingales.
The journal of Fourier analysis and applications [[Elektronische Ressource]], Tome 4 (1998) no. 2, p. 151.

Voir la notice de l'article dans European Digital Mathematics Library

Classification : 60G46, 42C10, 42C15, 42C20
Mots-clés : image reconstruction, orthonormal bases, expansion, generalized Haar functions, martingale 
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     author = {J.L. Denny and C.K. Abbey},
     title = {Partial {Sums} of {Orthonormal} {Bases} {Preserving} {Positivity} - and {Martingales.}},
     journal = {The journal of Fourier analysis and applications [[Elektronische Ressource]]},
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     volume = {4},
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J.L. Denny; C.K. Abbey. Partial Sums of Orthonormal Bases Preserving Positivity - and Martingales.. The journal of Fourier analysis and applications [[Elektronische Ressource]], Tome 4 (1998) no. 2, p. 151. https://geodesic-test.mathdoc.fr/item/JFAA_1998__4_2_59557/