Wright type delay differential equations with negative Schwarzian
E. Liz, M. Pinto, G. Robledo, V. Tkachenko, S. Trofimchuk
Abstract
We prove that the well-known 3/2 stability condition established for the Wright equation (WE) still holds if the nonlinearity p((-x)-1) in WE is replaced by a decreasing or unimodal smooth function f with f'(0)<0 satisfying the standard negative feedback and below boundedness conditions and having everywhere negative Schwarz derivative.
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