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Definition of ex2 on 4.2.1 #106

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gaxiiiiiiiiiiii opened this issue Dec 14, 2020 · 0 comments

gaxiiiiiiiiiiii commented Dec 14, 2020 •

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The book saids:

Inductive ex2 A P Q : Prop := ex_intro2 x of P x & Q x.

I guess it should be like this:

Inductive ex2 A P Q : Prop := ex_intro2 (x : A) of P x & Q x.

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