Library Coq.NArith.NArith
Library for binary natural numbers
Require Export BinNums.
Require Export BinPos.
Require Export BinNat.
Require Export Nnat.
Require Export Ndiv_def.
Require Export Nsqrt_def.
Require Export Ngcd_def.
Require Export NArithRing.
N contains an order tactic for natural numbers
Note that N.order is domain-agnostic: it will not prove
1<=2 or x<=x+x, but rather things like x<=y -> y<=x -> x=y.