Dodgson condensation Dodgson condensation In mathematics, Dodgson condensation is a method of computing the determinants of square matrices. It is named for its inventor, Charles Lutwidge Dodgson (better known as Lewis Carroll). The method in the case of an "n" × "n" matrix is to construct an ("n" − 1) × ("n" − 1) matrix, an ("n" − 2) × ("n" − 2), and so on, finishing with a 1 × 1 matrix, which has one entry, the determinant of the original matrix. This algorithm can be described in the following four steps: One wishes to find We make a matrix of
Skeffington Lutwidge The expedition sailed up to and around Spitsbergen, managing to reach within ten degrees of the North Pole, but was prevented from travelling further north by thick sea ice, and returned to Britain in September. Sailing with the "Carcass" was a young Horatio Nelson, whose position as a midshipman on the expedition had been arranged by his uncle, Maurice Suckling. Suckling and Lutwidge knew each other well, Lutwidge having served under Suckling on a number of occasions, including time spent acting against privateers in 1771. Nelson was given the role of coxswain of Lutwidge's gig. Nelson managed to obtain command