Show that asymptotic stability of the adaptation error is assured for $0<\gamma<2, \alpha>0$.
$$\hat{\theta}(t + 1) = \hat{\theta}(t) + \frac{\gamma \phi(t)\varepsilon^{0}(t + 1)}{\alpha + \phi^T(t)\phi(t)}$$
• What is $\varphi$, $\varepsilon$? – Carlos Feb 19 '18 at 7:02