Clean up imports everywhere.

[numerical-analysis.git] / src / Linear / QR.hs

diff --git a/src/Linear/QR.hs b/src/Linear/QR.hs
index ea72958d74163c30679ce75231b5a48a8f0f45dd..283512a29494da41cb24db69ee2170cb213e53f1 100644 (file)
--- a/src/Linear/QR.hs
+++ b/src/Linear/QR.hs
@@ -12,7 +12,6 @@ import qualified Algebra.Ring as Ring ( C )
 import qualified Algebra.Algebraic as Algebraic ( C )
 import Data.Vector.Fixed ( ifoldl )
 import Data.Vector.Fixed.Cont ( Arity )
-import Debug.Trace
 import NumericPrelude hiding ( (*) )
 
 import Linear.Matrix (
@@ -98,6 +97,9 @@ givens_rotator i j xi xj =
 --   factorization. We keep the pair updated by multiplying @q@ and
 --   @r@ by the new rotator (or its transpose).
 --
+--   We do not require that the diagonal elements of R are positive,
+--   so our factorization is a little less unique than usual.
+--
 --   Examples:
 --
 --   >>> import Linear.Matrix