The problem of deciding which definitions are interesting is far from being formal.
Yes, and the problem of deciding which lemmas to prove and in general what structure to try for a proof is also far from begin formal. Verifying a proposed proof is the formal bit.
The problem of deciding which definitions are interesting is far from being formal.
Yes, and the problem of deciding which lemmas to prove and in general what structure to try for a proof is also far from begin formal. Verifying a proposed proof is the formal bit.