2 alias id "O" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1/1)".
3 alias id "S" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1/2)".
4 alias id "nat" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1)".
6 let rec plus n m : nat \def
9 | (S x) \Rightarrow S (plus x m) ].