summation theor
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Feynman checkerboard — The Feynman Checkerboard or Relativistic Chessboard model was Richard Feynman’s sum over paths formulation of the kernel for a free spin ½ particle moving in one spatial dimension. It provides a representation of solutions of the Dirac equation… … Wikipedia
Multipole expansion — A multipole expansion is a mathematical series representing a function that depends on angles usually the two angles on a sphere. These series are useful because they can often be truncated, meaning that only the first few terms need to be… … Wikipedia
Alternatives to general relativity — are physical theories that attempt to describe the phenomena of gravitation in competition to Einstein s theory of general relativity.There have been many different attempts at constructing an ideal theory of gravity. These attempts can be split… … Wikipedia
Fermionic field — In quantum field theory, a fermionic field is a quantum field whose quanta are fermions; that is, they obey Fermi Dirac statistics. Fermionic fields obey canonical anticommutation relations rather than the canonical commutation relations of… … Wikipedia
