After working 14 years as an English lawyer, I became a Professor of Mathematics at Cambridge.
I published 967 mathematical papers, with my output rivaling that of Euler or Cauchy.
I invented the theory of matrices, though the rectangular structure had been known since 2000 B.C. in China.
I also created the idea of multi-dimensional abstract geometry involving curves and surfaces.
My other mathematical discoveries include invariant theory, symmetric functions, integral functions, noncommutative group theory, periodic functions, and even some topics in applied mathematics.
I had a world-wide reputation for having an "unending" encyclopaedic knowledge of mathematics.
Arthur Cayley (1821 - 1895)