alias id "nat" = "cic:/matita/tests/first/nat.ind#xpointer(1/1)".
alias id "O" = "cic:/matita/tests/first/nat.ind#xpointer(1/1/1)".
alias id "eq" = "cic:/matita/tests/first/eq.ind#xpointer(1/1)".
alias id "nat" = "cic:/matita/tests/first/nat.ind#xpointer(1/1)".
alias id "O" = "cic:/matita/tests/first/nat.ind#xpointer(1/1/1)".
alias id "eq" = "cic:/matita/tests/first/eq.ind#xpointer(1/1)".