The first efforts were based on optimal control approaches which grew out of the calculus of variations developed at the University of Chicago in the first half of the 20th century most notably by Gilbert Ames Bliss.
Gilbert and Sullivan | Fort Bliss | Ames, Iowa | W. S. Gilbert | Humphrey Gilbert | Gilbert | Gilbert O'Sullivan | Gilbert Gottfried | Gilbert Burnet | George Gilbert Scott | Arthur Bliss | Ames | Gilbert Islands | Gilbert du Motier, marquis de Lafayette | Gilbert, Arizona | Cass Gilbert | Paul Gilbert | Giles Gilbert Scott | Gilbert Stuart | Gilbert de Clare | Brantley Gilbert | Bliss | Hurricane Gilbert | Gilbert du Motier, Marquis de Lafayette | Gilbert Arenas | L. Wolfe Gilbert | Gilbert White | Gilbert Elliot-Murray-Kynynmound, 1st Earl of Minto | Gilbert Bécaud | Chad Gilbert |