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def definition def or abbrev

rung

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formal statement (Lean)

  69def rung : OreClass → ℕ
  70  | .silicate    => 0
  71  | .carbonate   => 1
  72  | .oxide       => 2
  73  | .sulfide     => 3
  74  | .metallic_Fe => 4
  75  | .metallic_Ni => 5
  76  | .platinoid   => 6
  77

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