diff --git a/src/Numerics/LinearAlgebra/Generic/Matrix.cs b/src/Numerics/LinearAlgebra/Generic/Matrix.cs
index dfbc22ca..0bbe4999 100644
--- a/src/Numerics/LinearAlgebra/Generic/Matrix.cs
+++ b/src/Numerics/LinearAlgebra/Generic/Matrix.cs
@@ -204,24 +204,6 @@ namespace MathNet.Numerics.LinearAlgebra.Generic
             Storage.At(row, column, value);
         }
 
-        /// <summary>
-        /// True if all fields of this matrix can be set to any value.
-        /// False if some fields are fixed, like on a diagonal matrix.
-        /// </summary>
-        public bool IsFullyMutable
-        {
-            get { return Storage.IsFullyMutable; }
-        }
-
-        /// <summary>
-        /// True if the specified field can be set to any value.
-        /// Fall if the field is fixed, like an off-diagonal field on a diagonal matrix.
-        /// </summary>
-        public bool IsMutable(int row, int column)
-        {
-            return Storage.IsMutable(row, column);
-        }
-
         /// <summary>
         /// Sets all values to zero.
         /// </summary>
diff --git a/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs b/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
index 99dbe5aa..9aace840 100644
--- a/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
@@ -77,11 +77,19 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
         /// <remarks>WARNING: This method is not thread safe. Use "lock" with it and be sure to avoid deadlocks.</remarks>
         public abstract void At(int row, int column, T value);
 
+        /// <summary>
+        /// True if all fields of this matrix can be set to any value.
+        /// False if some fields are fixed, like on a diagonal matrix.
+        /// </summary>
         public virtual bool IsFullyMutable
         {
             get { return true; }
         }
 
+        /// <summary>
+        /// True if the specified field can be set to any value.
+        /// Fall if the field is fixed, like an off-diagonal field on a diagonal matrix.
+        /// </summary>
         public virtual bool IsMutable(int row, int column)
         {
             return true;
diff --git a/src/UnitTests/LinearAlgebraTests/MatrixStructureTheory.cs b/src/UnitTests/LinearAlgebraTests/MatrixStructureTheory.cs
index 8c54125c..bbf8a1c8 100644
--- a/src/UnitTests/LinearAlgebraTests/MatrixStructureTheory.cs
+++ b/src/UnitTests/LinearAlgebraTests/MatrixStructureTheory.cs
@@ -19,14 +19,14 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests
 
         protected Matrix<T> CreateDenseFor(Matrix<T> m, int rows = -1, int columns = -1, int seed = 1)
         {
-            return m.IsFullyMutable
+            return m.Storage.IsFullyMutable
                 ? CreateDenseRandom(rows >= 0 ? rows : m.RowCount, columns >= 0 ? columns : m.ColumnCount, seed)
                 : CreateDenseZero(rows >= 0 ? rows : m.RowCount, columns >= 0 ? columns : m.ColumnCount);
         }
 
         protected Vector<T> CreateVectorFor(Matrix<T> m, int size, int seed = 1)
         {
-            return m.IsFullyMutable
+            return m.Storage.IsFullyMutable
                 ? CreateVectorRandom(size, seed)
                 : CreateVectorZero(size);
         }