Pp. 1-20), made important steps, but it was not till 1845 that Arthur Cayley (Coll.
Two methods of treatment have been carried on in parallel lines, the unsymbolic and the symbolic; both of these originated with Cayley, but he with Sylvester and the English school have in the main confined themselves to the former, whilst Aronhold, Clebsch, Gordan, and the continental schools have principally restricted themselves to the latter.
So the theory of the forms appertaining to a binary form of unrestricted order was first worked out by Cayley and P. A.
A theory of matrices has been constructed by Cayley in connexion particularly with the theory of linear transformation.
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