Dirac (disambiguation)

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 (Supercomputing facility)
• Dirac bracket, a generalization of the Poisson bracket
• Dirac constant, a reduced form of the Planck constant
• Dirac fermion, a fermion which is not its own antiparticle
• Dirac equation, a relativistic quantum mechanical wave equation
• Dirac notation, a standard notation for describing quantum states
• Dirac equation in particle physics
• Dirac large numbers hypothesis relating the size scale of the universe to the scales between different physical forces
• Dirac sea

Mathematics

• Dirac's theorem on Hamiltonian cycles, the statement that an n-vertex graph in which each vertex has degree at least n/2 must have a Hamiltonian cycle
• 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 k-connected graphs, the result that for every set of k vertices in a k-vertex-connected graph there exists a cycle that passes through all the vertices in the set
• Dirac delta function

Other uses

• 5997 Dirac, a main-belt asteroid
• 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
• Dirac measure, a mathematical measure that is a probability measure
• Dirac observables, see loop quantum gravity
• Dirac (dress), a Somali dress
• Dirac Medal

See also

• Dirac delta function, a generalized mathematical function
• Gabriel Andrew Dirac (1925–1984), graph theorist, Paul Dirac's stepson
• Dirak, former name of the town Karnut, Armenia
• Fermi–Dirac (disambiguation)