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 Navy, and is listed as a lieutenant in 1763, taking command of the purchased cutter in April that year. He remained with her until 1765, serving in the area of Liverpool. Lutwidge, by now a commander, commissioned the bomb vessel in June 1771, and served in the Irish Sea until the "Carcass" was paid off in April 1773. The "Carcass" was then refitted at Sheerness between March and April for a voyage to the Arctic, with Lutwidge retaining command. The expedition, under the overall command of Constantine Phipps, who commanded , sailed from the Nore on 10 June 1773.