Its origin lies in the spin-statistics theorem of 
Its origin lies in the spin-statistics theorem of relativistic quantum field theory. Examples of systems to which this idea applies include the quarks in a hadron or the electrons in an atom. Basically, it applies only to those particles that obey Fermi-Dirac statistics, as opposed to those that display Bose-Einstein statistics. Named after the recipient of the 1945 physics Nobel, FTP, identify this quantum principle that states that no two fermions can have the same four quantum numbers.
Its origin lies in the spin-statistics theorem of relativistic quantum field theory.
{Pauli exclusion} principle