# Documentation

Working state for Brent's root-finding method.

brent :: RealFloat a => (a -> a) -> a -> a -> a -> Either (Brent a a) aSource

`brent f x1 x2 xacc`

: attempt to find a root of a function known to
lie between x1 and x2, using Brent's method. The root will be refined
till its accuracy is +-xacc. If convergence fails, returns the final
state of the search.