The spaces of almost periodic and quasi-periodic functions are considered. We show that the local critical point properties can continue along the domain with the relative density property, and vanishing of the appropriate derivatives is only a "virtual" property. The stable virtual critical points of quasi-periodic functions are classified and the density result for the virtual critical points of type A(k) is proved. The special construction of almost periodic functions with prescribed properties is provided and applied to construct an almost periodic function which nas no density property of the nondegenerate critical points, althougth all its derivatives are almost periodic functions.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.