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def definition def or abbrev

w2Invariant

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formal statement (Lean)

  64def w2Invariant (F : Type) : ℕ :=

proof body

Definition body.

  65  2  -- Simplified: usually w₂ = 2 for totally real fields
  66
  67/-! ## Basic Properties -/
  68
  69/-- For Q itself: K₂(Z) = Z/2Z, ζ(-1) = -1/12 -/

depends on (6)

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