2 problems

Consider the Wright delay differential equation … Assume that all conditions (H) on $f$ are satisfied. Generalized Wright conjecture. If $-f'(0)<\pi/2$, then … for every solution…

Assume that $a\geq 0$ and that $f$ is an $S$-map. Let $K$ be the unique fixed point of $f$. Equation (1) has an equilibrium at $K$; a global attractor attracts the phase space, and…