In metamathematics, what convention is used to distinguish an informal proof about the system and a formal proof in the system?
I'd like to reserve "proof" for the object language, what should I write under a meta-theorem?
In metamathematics, what convention is used to distinguish an informal proof about the system and a formal proof in the system?
I'd like to reserve "proof" for the object language, what should I write under a meta-theorem?
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