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lemma proved term proof

octantSystems_length

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formal statement (Lean)

  67lemma octantSystems_length (n level octant : Nat) :
  68    (octantSystems n level octant).length = 2 := rfl

proof body

Term-mode proof.

  69
  70/-- At each level, the number of systems is at most 2 * (n + 1).
  71    Proof: each of min(8^level, n+1) octants contributes 2 systems. -/

depends on (10)

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