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Comment by lefra

4 hours ago

What about big T, square/angle brackets, and braces?

T is a translation function, square brackets indicate a term within another term (its context), and braces are standard substitution. It's deliberately vague to make discovery more fun (I know this is very controversial, but the most fun papers/articles I read are the ones whose notation I don't understand at all)

I try to give just about enough information to be able to understand it given some time and experimentation.