Bell, R. P. Eigen-values and eigen-functions for the operator \(d^2/dx^2-| x|\). (English) Zbl 0061.18305 Philos. Mag., VII. Ser. 35, 582-588 (1944). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document Keywords:ordinary differential equations, difference equations × Cite Format Result Cite Review PDF