theorem
proved
term proof
fcc_hcp_same_packing
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formal statement (Lean)
78theorem fcc_hcp_same_packing : packingEfficiencyApprox .FCC = packingEfficiencyApprox .HCP := rfl
proof body
Term-mode proof.
79
80/-! ## HCP c/a Ratio and φ Connection -/
81
82/-- Ideal c/a ratio for HCP: √(8/3) ≈ 1.633. -/