17 lines
247 B
Text
17 lines
247 B
Text
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open nat
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variables (P : ℕ → Prop)
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example (H1 : ∃n, P n) : ∃n, P n :=
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begin
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cases H1 with n p,
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apply (exists.intro n),
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assumption
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end
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example (H1 : ∃n, P n) : ∃n, P n :=
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begin
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cases H1 with n p,
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existsi n,
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assumption
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end
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