摘要：By using the fixed point theory and Lyapunov functional, we establish the existence and stability of asymptotically almost periodic solution to hematopoiesis of the form x ′ ( t ) = − a ( t ) x ( t ) + ∑ i = 1 k b i ( t ) 1 + x n ( t − τ i ( t ) ) $x'(t)=-a(t)x(t)+\sum_{i=1}^{k}\frac {b_{i}(t)}{1+x^{n}(t-\tau_{i}(t))}$ , t ∈ R $t\in\mathbb{R}$ . Unlike many previous related results, we do not assume the condition inf t ∈ R a ( t ) > 0 $\inf_{t\in\mathbb{R}}a(t)>0$ , which is a key assumption in their proofs.
关键词：asymptotically almost periodic ; almost periodic ; hematopoiesis
