2 problems

Consider sufficiently smooth approximations of Coulomb friction in the forced vibro-impact oscillator, and let the Hamiltonian islands and saddle-center bifurcation be those descri…

Let $f$ be a map of the form … where the higher-order terms satisfy … as $(x;\mu)\to(0;0)$, and let $B_\eta=\{x\in\mathbb{R}^n\mid\|x\|\leq\eta\}$. Assume $\det(I-A_L)>0$,…