Dirac (disambiguation)
Introduction '''Paul Dirac''' (1902–1984) was a Swiss-British theoretical physicist, Nobel laureate, and a founder of the field of quantum physics. '''Dirac''' may also refer to:
Physics * DiRAC, Distributed Research using Advanced Computing, a supercomputing facility* Dirac bracket, a generalization of the Poisson bracket* Dirac constant, a historical name for the reduced Planck constant* Dirac equation, a relativistic quantum mechanical wave equation* Dirac fermion, a fermion which is not its own antiparticle* Dirac large numbers hypothesis, relating the size scale of the universe to the scales between different physical forces* Dirac notation, a standard notation for describing quantum states* Dirac observables* Dirac sea
Mathematics * Dirac measure, a mathematical measure that is a probability measure* Dirac's theorem on chordal graphs, the characterization of chordal graphs as graphs in which all minimal separators are cliques* Dirac's theorem on cycles in -connected graphs, the result that for every set of  vertices in a -vertex-connected graph there exists a cycle that passes through all the vertices in the set* Dirac's theorem on Hamiltonian cycles, the statement that an -vertex graph in which each vertex has degree at least  must have a Hamiltonian cycle* Dirac delta function
Other uses * Dirac (dress), a Somali dress* Dirac (software), a relativistic quantum chemistry program* Dirac (video compression format), an open digital video codec developed by BBC Research* Dirac, Charente, a commune of the Charente ''département'', in France* 5997 Dirac, a main-belt asteroid* Gabriel Andrew Dirac (1925–1984), graph theorist, Paul Dirac's stepson
See also * Dirac Medal (disambiguation)* Fermi–Dirac (disambiguation)* * Dirak, former name of the town Karnut, Armenia