Dido when the new city of Carthage had been established and become prosperous, Iarbas, a native king of the Maxitani or Mauritani (manuscripts differ), demanded Dido for his wife or he would make war on Carthage. Dido's envoys, fearing Iarbas, told Dido only that Iarbas' terms for peace were that someone from Carthage must dwell permanently with him to teach Phoenician ways and they added that of course no Carthaginian would agree to dwell with such savages. Dido condemned any who would feel that way when they should indeed give their lives for the city if necessary. Dido's envoys then explained
DIDO (software) in solving for the costates in optimal control problems. DIDO generates spectrally accurate solutions whose extremality can be verified using Pontryagin's Minimum Principle. Because no knowledge of pseudospectral methods is necessary to use it, DIDO is often used as a fundamental mathematical tool for solving optimal control problems. That is, a solution obtained from DIDO is treated as a candidate solution for the application of Pontryagin's minimum principle as a necessary condition for optimality. DIDO is used world wide in academia, industry and government laboratories. Thanks to NASA, DIDO was flight-proven in 2006. On November 5, 2006, NASA used DIDO