@iqagnot @ludivokrug Колеблющийся https://ru.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BB%D0%B5%D0%B1%D0%BB%D1%8E%D1%89%D0%B8%D0%B9%D1%81%D1%8F_%D1%88%D1%82%D0%B0%D1%82
Gregory's Server