Padhi, SeshadevSrivastava, ShilpeeDix, Julio G.2009-02-132012-02-242009-01Padhi, S., & Srivastava, S. (2009). Existence of three nonnegative periodic solutions for functional differential equations and applications to hematopoiesis. Pan American Mathematical Journal, 19(1), pp. 27-36.https://hdl.handle.net/10877/3822Using the Leggett-Wiliams fixed point theorem, we show the existence of at least three solutions to a system of first-order nonlinear functional differential equations. These solutions have non-negative components which makes them suitable for hematopoiesis models.Text10 pages1 file (.pdf)enperiodic solutionsfunctional differential equationMathematicsArticle