Dido, Queen of Carthage (opera) Dido, Queen of Carthage (opera) Dido, Queen of Carthage was an opera in three acts by Stephen Storace. Its English libretto by Prince Hoare was adapted from Metastasio's 1724 libretto, "Didone abbandonata" ("Dido Abandoned"), which had been set by many composers. Storace's opera premiered on 23 May 1792 at The King's Theatre in London combined with a performance of his masque, "Neptune's Prophecy". The story is based on that of Dido and Aeneas in the fourth book of Virgil's "Aeneid". The opera was not a success and was never revived after its original run of performances. The score has been
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