data.nat
========

The natural numbers.

* [basic](basic.lean) : the natural numbers, with succ, pred, addition, and multiplication
* [order](order.lean) : less-than, less-then-or-equal, etc.
* [bquant](bquant.lean) : bounded quantifiers
* [sub](sub.lean) : subtraction, and distance
* [div](div.lean) : div and mod
* [gcd](gcd.lean) : gcd, lcm, and coprime
* [power](power.lean)
* [bigops](bigops.lean) : finite sums and products
* [find](find.lean) : search for a witness to an existence statement