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Four-fermion interactions refer to a type of interaction in quantum field theory where four fermions—particles that follow Fermi-Dirac statistics—interact with one another. Fermions include particles such as electrons, quarks, neutrinos, and their antiparticles. In a four-fermion interaction, two pairs of fermions interact simultaneously.

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  1. Quantum field theory
  2. Mathematical physics
  3. Applied mathematics
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