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lemma proved tactic proof

lcm_8_45_div_8

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formal statement (Lean)

  26lemma lcm_8_45_div_8 : Nat.lcm 8 45 / 8 = 45 := by

proof body

Tactic-mode proof.

  27  have h := lcm_8_45_eq_360
  28  have : 360 / 8 = 45 := by decide
  29  simpa [h] using this
  30
  31/-- Exact cycle counts: lcm(8,45)/45 = 8. -/

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