Mexicana de Aviación The headquarters of the company were in the Mexicana de Aviación Tower in Colonia del Valle, Benito Juárez, Mexico City. In addition to domestic services, Mexicana operated flights to various international destinations in North America, Central America, the Caribbean, South America and Europe (until August 31). Their primary hub was Mexico City's Benito Juarez International Airport, with secondary hubs at Cancún International Airport, and Guadalajara's Don Miguel Hidalgo y Costilla International Airport. Mexicana's main competitors were Aeroméxico (although the two companies "codeshared" on several routes), and low-cost carriers such as Volaris and Interjet. Mexicana was North America's oldest airline and
Continuous function makes "f" continuous. If "f" is surjective, this topology is canonically identified with the quotient topology under the equivalence relation defined by "f". Dually, for a function "f" from a set "S" to a topological space "X", the initial topology on "S" is defined by designating as an open set every subset "A" of "S" such that formula_112 for some open subset "U" of "X". If "S" has an existing topology, "f" is continuous with respect to this topology if and only if the existing topology is finer than the initial topology on "S". Thus the initial topology can be