fact: Record Signature : Type := BuildSignature { Sort : Type ; Symbol : Type ; symbol_types : Symbol → SymbolType_internal Sort }.
imports: HoTT.Utf8Minimal HoTT.Basics HoTT.Classes.implementations.ne_list HoTT.Classes.implementations.family_prod HoTT.Types HoTT.HSet HoTT.Classes.implementations.list