Flights, crossings, launches

Originally Posted in Hebrew on June 17, 2007 The usual way of classifying flights or crossings today is to classify them according to two types of flights or crossings: A. Those that are based on transmission. B. The ones that are based on jump. The first-order transitions use the substitution of one-space atoms in theהמשך לקרוא "Flights, crossings, launches"