12 lines
329 B
Text
12 lines
329 B
Text
2 goals
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case tree.leaf
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⊢ foo tree.leaf = tree.leaf
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case tree.node
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a_left : tree,
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a_val : ℕ,
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a_right : tree,
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a_ih_left : foo a_left = a_left,
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a_ih_right : foo a_right = a_right
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⊢ foo (tree.node a_left a_val a_right) = tree.node a_left a_val a_right
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induction_naming2.lean:7:0: warning: declaration '[anonymous]' uses sorry
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