This mathematician's name comes second in the name of the theorem stating that  each square matrix satisfies its own characteristic equation.
When the type of matrix named for this person is left multiplied by a skew-symmetric matrix, the   result is Hermitian. This mathematician's name comes second in the name of the theorem stating that  each square matrix satisfies its own characteristic equation. This person is credited for the icosian   game, which involves finding a cycle on a dodecahedron that visits each vertex once, which is why  graph cycles which visit each node exactly once are named for him. He carved one of his equations  into Brougham Bridge in Dublin after being inspired to discover it by a walk over the bridge. Name  this Irish mathematician and physicist who developed the concepts of tensors and quaternions.
When the type of matrix named for this person is left multiplied by a skew-symmetric matrix, the   result is Hermitian.
Sir William Rowan Hamilton