Disambiguation evidence for Schwinger’s proper‑time formalism via surface form
"Schwinger’s proper‑time formalism"
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Triples where some other subject referred to this entity
as "Schwinger’s proper‑time formalism".
Heisenberg–Euler effective Lagrangian
→
generalizedBy
→
"Schwinger’s proper‑time formalism"
ⓘ
↳ resolves to Schwinger’s proper‑time formalism