In mathematics complex analysis, the Sarason interpolation theorem, introduced by Sarason (1967), is a generalization of the Caratheodory interpolation theorem and Nevanlinna–Pick interpolation.
References Sarason, Donald (1967). "Generalized interpolation in H∞". Transactions of the American Mathematical Society. 127 (2): 179–203. doi:10.2307/1994641. ISSN 0002-9947. JSTOR 1994641. MR 0208383.