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theorem proved term proof

mul_one

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formal statement (Lean)

 190theorem mul_one (n : LogicNat) : n * succ zero = n := by

proof body

Term-mode proof.

 191  show n * succ zero = n
 192  rw [mul_succ, mul_zero, zero_add]
 193

used by (40)

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depends on (6)

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