@{\lambda ${ident i} : $ty. $p}
@{\lambda ${ident i} . $p}}}.
+(* Bugged notation: $T is not used if provided *)
+notation > "\exists list1 ident x sep , opt (: T). term 19 Px"
+ with precedence 20
+ for ${ default
+ @{ ${ fold right @{$Px} rec acc @{'exists (λ${ident x}:$T.$acc)} } }
+ @{ ${ fold right @{$Px} rec acc @{'exists (λ${ident x}.$acc)} } }
+ }.
+
notation "hvbox(\langle term 19 a, break term 19 b\rangle)"
with precedence 90 for @{ 'pair $a $b}.