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docs: Docs for Wick contractions

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jstoobysmith 2025-02-07 06:58:41 +00:00
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HepLean/PerturbationTheory/WickContraction/Uncontracted.lean
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@ -16,7 +16,8 @@ namespace WickContraction
variable {n : ℕ} (c : WickContraction n)
open HepLean.List
/-- Given a Wick contraction, the finset of elements of `Fin n` which are not contracted. -/
/-- For a Wick contraction `c`, `c.uncontracted` is defined as the finset of elements of `Fin n`
which are not in any contracted pair. -/
def uncontracted : Finset (Fin n) := Finset.filter (fun i => c.getDual? i = none) (Finset.univ)
lemma congr_uncontracted {n m : ℕ} (c : WickContraction n) (h : n = m) :