# Arbitrary-precision numbers

The `gmp-mpfr` crate has been replaced by [`rug`][rug]. The main
features of the `rug` crate are:

* big [integers][rug int] with arbitrary precision,
* big [rational numbers][rug rat] with arbitrary precision,
* multi-precision [floating-point numbers][rug flo] with correct
  rounding, and
* multi-precision [complex numbers][rug com] with correct rounding.

The crate is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version. See the full text of the
[GNU LGPL][lgpl] and [GNU GPL][gpl] for details.

[gpl]:     https://www.gnu.org/licenses/gpl-3.0.html
[lgpl]:    https://www.gnu.org/licenses/lgpl-3.0.en.html
[rug com]: https://docs.rs/rug/*/rug/struct.Complex.html
[rug flo]: https://docs.rs/rug/*/rug/struct.Float.html
[rug int]: https://docs.rs/rug/*/rug/struct.Integer.html
[rug rat]: https://docs.rs/rug/*/rug/struct.Rational.html
[rug]:     https://docs.rs/rug/