Cube root this required the construction, now known to be impossible, of the length . A method for extracting cube roots appears in "The Nine Chapters on the Mathematical Art", a Chinese mathematical text compiled around the 2nd century BCE and commented on by Liu Hui in the 3rd century CE. The Greek mathematician Hero of Alexandria devised a method for calculating cube roots in the 1st century CE. His formula is again mentioned by Eutokios in a commentary on Archimedes. In 499 CE Aryabhata, a mathematician-astronomer from the classical age of Indian mathematics and Indian astronomy, gave a method for finding
USS Georgia (SSGN-729) USS Georgia (SSGN-729) USS "Georgia" (SSBN-729/SSGN-729), an , is the second ship of the United States Navy to be named for the fourth state. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 20 February 1976 and her keel was laid down on 7 April 1979. She was launched on 6 November 1982 sponsored by Mrs. Sheila M. Watkins, and commissioned as a fleet ballistic missile submarine (SSBN) on 11 February 1984, with Captain A. W. Kuester commanding the Blue crew and Captain M. P. Gray commanding the Gold