Comment Comment by defrost quaternions - 1843, Hamiltonprojective geometry - 1420's but big in the 19th Century.These are things I used heavily programming earth mapping systems in the mid 1980s to mid 1990s. Principal reference text was from the 1920s. parent defrost 2 years ago
projective geometry - 1420's but big in the 19th Century.
These are things I used heavily programming earth mapping systems in the mid 1980s to mid 1990s. Principal reference text was from the 1920s.