diff --git a/src/bounds/cylinder.rs b/src/bounds/cylinder.rs
index a966fd6..9459784 100644
--- a/src/bounds/cylinder.rs
+++ b/src/bounds/cylinder.rs
@@ -14,4 +14,3 @@
 // limitations under the License.
 
 //! Bounding cylinder
-
diff --git a/src/core/core.rs b/src/core/core.rs
index 0aa9c42..8638cca 100644
--- a/src/core/core.rs
+++ b/src/core/core.rs
@@ -15,7 +15,9 @@
 
 //! Core datatypes and conversion traits for 3D mathematics
 
-pub use self::mat::{Mat2, ToMat2, Mat3, ToMat3, Mat4, ToMat4};
+pub use self::mat::{Mat2, ToMat2};
+pub use self::mat::{Mat3, ToMat3};
+pub use self::mat::{Mat4, ToMat4};
 pub use self::quat::{Quat, ToQuat};
 pub use self::vec::{Vec2, ToVec2, AsVec2};
 pub use self::vec::{Vec3, ToVec3, AsVec3};
@@ -35,3 +37,10 @@ pub trait Dimensional<T,Slice> {
 pub trait Swap {
     pub fn swap(&mut self, a: uint, b: uint);
 }
+
+pub trait ComponentWise<T> {
+    pub fn component_add(&self) -> T;
+    pub fn component_mul(&self) -> T;
+    pub fn component_min(&self) -> T;
+    pub fn component_max(&self) -> T;
+}
diff --git a/src/geom/ray.rs b/src/geom/ray.rs
index cf5ad12..b04d151 100644
--- a/src/geom/ray.rs
+++ b/src/geom/ray.rs
@@ -31,7 +31,6 @@ impl<T> Ray2<T> {
     }
 }
 
-
 #[deriving(Clone, Eq)]
 pub struct Ray3<T> {
     origin: Point3<T>,