13 lines
300 B
Text
13 lines
300 B
Text
theorem ex1 (n m : Nat) : 0 + (n, m).1 = n := by
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simp only
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rw [Nat.zero_add]
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theorem ex2 (n m : Nat) : 0 + (n, m).1 = n := by
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simp
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theorem ex3 (n m : Nat) : 0 + (n, m).1 + 0 = n := by
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simp only [Nat.add_zero]
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rw [Nat.zero_add]
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theorem ex4 (n m : Nat) : 0 + (n, m).1 + 0 = n := by
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simp
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