. . "Fermi\u2013Dirac particle-energy distribution" . . "fermion" . . . "Fermi\u2013Dirac statistics" . . "Fermi–Dirac statistics" . "Fermi\u2013Dirac distribution function" . . "free electrons" . "Fermi\u2013Dirac distribution" . . . "Fermi\u2013Dirac" . "level filling" . "FD distribution function" . . "New Statistics" . "quantum statistics" . "Fermi-Dirac distribution" . "Fermi-distribution" . . "Fermi" . . . "Fermi\u2013Dirac statistics" . "Fermi-Dirac Statistics" . "Dirac" . . . "Fermi\u2013Dirac statistical distribution" . "Fermi-Dirac statistics" . "Fermi%E2%80%93Dirac_statistics#Fermi.E2.80.93Dirac_distribution" . . . "Fermi-Dirac" . "system comprising many identical particles that obey the Pauli exclusion principle" . "fermionic statistics" .