19 lines
389 B
Text
19 lines
389 B
Text
example : α → α := by
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--^ $/lean/plainGoal
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--^ $/lean/plainGoal
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intro a
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--^ $/lean/plainGoal
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--^ $/lean/plainGoal
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--v $/lean/plainGoal
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focus
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apply a
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example : α → α := by
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--^ $/lean/plainGoal
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example : 0 + n = n := by
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induction n with
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| zero => rfl
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--^ $/lean/plainGoal
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| succ
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--^ $/lean/plainGoal
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