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def definition def or abbrev

applyC

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formal statement (Lean)

  82def applyC (e : LedgerEntry) : LedgerEntry :=

proof body

Definition body.

  83  { e with charge := -e.charge }
  84
  85/-- **THEOREM**: Charge conjugation preserves cost.
  86    This is the J(x) = J(1/x) symmetry at the ledger level. -/

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