Fix compiler warnings and doctests.

[numerical-analysis.git] / src / Roots / Fast.hs

diff --git a/src/Roots/Fast.hs b/src/Roots/Fast.hs
index 0deb1fd6237a5909ea7d15a252f09b524093d1bf..b3b5818782fede0db3e6b465dc9186d8e29a1ca5 100644 (file)
--- a/src/Roots/Fast.hs
+++ b/src/Roots/Fast.hs
@@ -16,7 +16,6 @@ import NumericPrelude hiding (abs)
 import qualified Algebra.Absolute as Absolute
 import qualified Algebra.Additive as Additive
 import qualified Algebra.Algebraic as Algebraic
-import qualified Algebra.Field as Field
 import qualified Algebra.RealRing as RealRing
 import qualified Algebra.RealField as RealField
 
@@ -118,7 +117,7 @@ fixed_point_iterations f x0 =
 --   We also return the number of iterations required.
 --
 fixed_point_with_iterations :: (Normed a,
-                                Algebraic.C a,
+                                Additive.C a,
                                 RealField.C b,
                                 Algebraic.C b)
                             => (a -> a)  -- ^ The function @f@ to iterate.