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Words, grammatical forms and meanings linked to the ontology.

Furry's theorem en · PROPN

Etymology

The theorem was derived by Wendell H. Furry in 1937.

Meanings

  1. In quantum electrodynamics, a theorem stating that if a Feynman diagram consists of a closed loop of fermion lines with an odd number of vertices, its contribution to the amplitude vanishes (and therefore a single photon cannot arise from the vacuum or be absorbed by it).