Mathematician:William Rowan Hamilton

Mathematician
Irish mathematician and physicist famous (among other things) for: Coined the term associative in about $1844$.
 * Creating the field of Hamiltonian mechanics;
 * The discovery of quaternions;
 * Development of aspects of graph theory.

Nationality
Irish, although at that time Ireland was politically part of Great Britain.

History

 * Born: 4 Aug 1805, Dublin, Ireland
 * 1824: Entered Trinity College
 * 1827: Invited to apply for vacant Professorship of Astronomy at University of Dublin, and was so appointed
 * 1835: Received a knighthood
 * Died: 2 Sept 1865, Dublin, Ireland

Theorems and Definitions

 * Hamiltonian
 * Hamilton Cycle
 * Hamiltonian Graph
 * Hamiltonian Group
 * Hamiltonian Matrix
 * Hamiltonian Mechanics
 * Hamiltonian Path
 * Semi-Hamiltonian Graph
 * Hamilton-Jacobi Equation (with )
 * Quaternions


 * Cayley-Hamilton Theorem (with )
 * Hamilton's Equations
 * Hamilton's Principle

Publications

 * 1826: Theory of Systems of Rays
 * 1834: On a General Method in Dynamics
 * 1835: Algebra as the Science of Pure Time
 * 16 October 1843: $i^2 = j^2 = k^2 = i j k = -1$ (in the stone of )




 * 1853:
 * 1866: Elements of Quaternions (posthumous)