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theorem proved term proof

toRat_pos

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formal statement (Lean)

  73theorem toRat_pos (v : MultIndex) : 0 < toRat v := by

proof body

Term-mode proof.

  74  unfold toRat
  75  rw [Finsupp.prod]
  76  apply Finset.prod_pos
  77  intro p _
  78  apply zpow_pos
  79  exact_mod_cast p.prop.pos
  80

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depends on (3)

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