34 lines
496 B
Text
34 lines
496 B
Text
example (xs : list ℕ) : ℕ :=
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begin
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induction xs,
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case list.cons {}
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end
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example (xs : list ℕ) : ℕ :=
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begin
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cases xs,
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case list.cons {}
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end
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example (xs : list ℕ) : ℕ :=
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begin
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induction xs,
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case list.cons x xs {
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cases xs,
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case list.cons x xs {}
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}
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end
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open list
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example (xs : list ℕ) : ℕ :=
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begin
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induction xs,
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case cons {}
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end
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example (xs : list ℕ) : ℕ :=
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begin
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induction xs,
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case list.cons x xs ih { apply ih },
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case list.nil { apply 0 }
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end
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