Dufresnoy, J.; Pisot, C. Sur la rĂ©lation fonctionnelle \(f(x+1)-f(x) =\varphi(x)\). (French) Zbl 0122.09802 Bull. Soc. Math. Belg. 15, 259-270 (1963). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 9 Documents Keywords:ordinary differential equations PDFBibTeX XMLCite \textit{J. Dufresnoy} and \textit{C. Pisot}, Bull. Soc. Math. Belg. 15, 259--270 (1963; Zbl 0122.09802)