alias nat     /Coq/Init/Datatypes/nat.ind#1/1
alias eq      /Coq/Init/Logic/eq.ind#1/1
alias eq_ind  /Coq/Init/Logic/eq_ind.con
alias O       /Coq/Init/Datatypes/nat.ind#1/1/1
alias S       /Coq/Init/Datatypes/nat.ind#1/1/2
alias plus    /Coq/Init/Peano/plus.con
alias mult    /Coq/Init/Peano/mult.con
alias le      /Coq/Init/Peano/le.ind#1/1
alias lt      /Coq/Init/Peano/lt.con
alias not     /Coq/Init/Logic/not.con
alias f_equal /Coq/Init/Logic/f_equal.con

!n:nat.(eq nat (plus O n) (plus n O))