13 lines
253 B
Text
13 lines
253 B
Text
new_frontend
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theorem ex1 : False :=
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by {
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assumption -- should not use the auxiliary declaration `ex1 : False`
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}
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variables (x y : Nat) in
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theorem ex2 : x = y :=
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by {
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subst x; -- should not use the auxiliary declaration `ex2 : x = y`
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exact rfl
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}
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