def
definition
def or abbrev
varDegree
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formal statement (Lean)
87def varDegree {n : ℕ} (f : CNFFormula n) (j : Fin n) : ℕ :=
proof body
Definition body.
88 (f.clauses.filter (fun c => containsVar c j)).length
89
90/-- Flipping bit j does not change the value at any other index. -/