Lewis, D. C. Orthogonal functions whose derivatives are also orthogonal. (English) Zbl 0052.29201 Rend. Circ. Mat. Palermo, II. Ser. 2, 159-168 (1953). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 Documents Keywords:approximation and series expansion × Cite Format Result Cite Review PDF Full Text: DOI