Non-Euclidean geometry caused a re-examination of the teaching of geometry based on Euclid's Elements. This curriculum issue was hotly debated at the time and was even the subject of a book, "Euclid and his Modern Rivals", written by Charles Lutwidge Dodgson (1832–1898) better known as Lewis Carroll, the author of "Alice in Wonderland". In analytic geometry a plane is described with Cartesian coordinates : "C" = { ("x,y") : "x", "y" ∈ ℝ }. The points are sometimes identified with complex numbers where ε ∈ { –1, 0, 1}. The Euclidean plane corresponds to the case since the modulus of is given
Skeffington Lutwidge of the "Carcass"s cutter as the expedition progressed. By 1800 Lutwidge began to circulate a story that while the ship had been trapped in the ice, Nelson had seen and pursued a polar bear, before being ordered to return to the ship. Lutwidge's later version, in 1809, reported that Nelson and a companion had given chase to the bear, but on being questioned why, replied that "I wished, Sir, to get the skin for my father." Nelson referred to Lutwidge as 'that good old man'. Lutwidge was appointed to command the 28-gun sixth rate in August 1775, and sailed to