User:Jheald/Spinor

Motivation
As recognised by Eugene Wigner in 1927, in quantum physics and quantum chemistry, each set of degenerate eigenstates of the Hamiltonian operator makes up a representation of the symmetry group of the Hamiltonian, that barring accidental degeneracies will correspond to an irreducible representation. Identifying the irreducible representations therefore allows one to label the states, predict how they will split under perturbations; and predict non-zero transition elements.

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 * User:Jheald/Irreducible representation
 * User:Jheald/Wigner's theorem

Eigenchris
 * Spinors for beginners video series
 * powerpoint slides