numbers with error propagation and scientific rounding
This class is a container class for numbers with a number of
associated symmetric and asymmetric errors.  It overloads practically
all common arithmetic operations and trigonometric functions to
propagate the errors.  It can do proper scientific rounding.

Maintainer: Alexander Bluhm <bluhm@openbsd.org>

WWW: https://metacpan.org/release/Number-WithError
