Linear Algebra: add new sparse factories also to CreateMatrix type, drop no longer valid comments on zero-length

src/Numerics/LinearAlgebra/Builder.cs

@@ -74,7 +74,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
             };
         }
 
-        internal override double AddEntries(double x, double y)
+        internal override double Add(double x, double y)
         {
             return x + y;
         }
@@ -142,7 +142,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
             };
         }
 
-        internal override float AddEntries(float x, float y)
+        internal override float Add(float x, float y)
         {
             return x + y;
         }
@@ -212,7 +212,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
             };
         }
 
-        internal override Complex AddEntries(Complex x, Complex y)
+        internal override Complex Add(Complex x, Complex y)
         {
             return x + y;
         }
@@ -280,7 +280,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
             };
         }
 
-        internal override Numerics.Complex32 AddEntries(Numerics.Complex32 x, Numerics.Complex32 y)
+        internal override Numerics.Complex32 Add(Numerics.Complex32 x, Numerics.Complex32 y)
         {
             return x + y;
         }
@@ -328,6 +328,8 @@ namespace MathNet.Numerics.LinearAlgebra
         /// </summary>
         public abstract T One { get; }
 
+        internal abstract T Add(T x, T y);
+
         /// <summary>
         /// Create a new matrix straight from an initialized matrix storage instance.
         /// If you have an instance of a discrete storage type instead, use their direct methods instead.
@@ -456,7 +458,6 @@ namespace MathNet.Numerics.LinearAlgebra
         /// <summary>
         /// Create a new dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         public Matrix<T> Dense(int rows, int columns)
         {
@@ -1186,8 +1187,7 @@ namespace MathNet.Numerics.LinearAlgebra
         /// <param name="columnIndices">The column index array of the coordinate format.</param>
         /// <param name="values">The data array of the coordinate format.</param>
         /// <returns>The sparse matrix from the coordinate format.</returns>
-        /// <remarks>Duplicate entries will be summed together and
-        /// explicit zeros will be not intentionally removed.</remarks>
+        /// <remarks>Duplicate entries will be summed together and explicit zeros will be not intentionally removed.</remarks>
         public Matrix<T> SparseFromCoordinateFormat(int rows, int columns, int valueCount, int[] rowIndices, int[] columnIndices, T[] values)
         {
             return Sparse(SparseCompressedRowMatrixStorage<T>.OfCoordinateFormat(rows, columns, valueCount, rowIndices, columnIndices, values));
@@ -1205,8 +1205,7 @@ namespace MathNet.Numerics.LinearAlgebra
         /// <param name="columnIndices">The column index array of the compressed sparse row format.</param>
         /// <param name="values">The data array of the compressed sparse row format.</param>
         /// <returns>The sparse matrix from the compressed sparse row format.</returns>
-        /// <remarks>Duplicate entries will be summed together and
-        /// explicit zeros will be not intentionally removed.</remarks>
+        /// <remarks>Duplicate entries will be summed together and explicit zeros will be not intentionally removed.</remarks>
         public Matrix<T> SparseFromCompressedSparseRowFormat(int rows, int columns, int valueCount, int[] rowPointers, int[] columnIndices, T[] values)
         {
             return Sparse(SparseCompressedRowMatrixStorage<T>.OfCompressedSparseRowFormat(rows, columns, valueCount, rowPointers, columnIndices, values));
@@ -1224,15 +1223,12 @@ namespace MathNet.Numerics.LinearAlgebra
         /// <param name="columnPointers">The column pointer array of the compressed sparse column format.</param>
         /// <param name="values">The data array of the compressed sparse column format.</param>
         /// <returns>The sparse matrix from the compressed sparse column format.</returns>
-        /// <remarks>Duplicate entries will be summed together and
-        /// explicit zeros will be not intentionally removed.</remarks>
+        /// <remarks>Duplicate entries will be summed together and explicit zeros will be not intentionally removed.</remarks>
         public Matrix<T> SparseFromCompressedSparseColumnFormat(int rows, int columns, int valueCount, int[] rowIndices, int[] columnPointers, T[] values)
         {
             return Sparse(SparseCompressedRowMatrixStorage<T>.OfCompressedSparseColumnFormat(rows, columns, valueCount, rowIndices, columnPointers, values));
         }
 
-        internal abstract T AddEntries(T x, T y);
-
         /// <summary>
         /// Create a new diagonal matrix straight from an initialized matrix storage instance.
         /// The storage is used directly without copying.
@@ -1244,7 +1240,6 @@ namespace MathNet.Numerics.LinearAlgebra
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         public Matrix<T> Diagonal(int rows, int columns)
         {

src/Numerics/LinearAlgebra/Complex/DenseMatrix.cs

@@ -86,7 +86,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new square dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DenseMatrix(int order)
@@ -97,7 +96,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DenseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Complex/DenseVector.cs

@@ -73,7 +73,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new dense vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public DenseVector(int length)

src/Numerics/LinearAlgebra/Complex/DiagonalMatrix.cs

@@ -74,7 +74,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new square diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DiagonalMatrix(int order)
@@ -85,7 +84,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns)
@@ -96,7 +94,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All diagonal cells of the matrix will be initialized to the provided value, all non-diagonal ones to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns, Complex diagonalValue)

src/Numerics/LinearAlgebra/Complex/SparseMatrix.cs

@@ -70,7 +70,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new square sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public SparseMatrix(int order)
@@ -81,7 +80,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public SparseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Complex/SparseVector.cs

@@ -69,7 +69,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// <summary>
         /// Create a new sparse vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public SparseVector(int length)

src/Numerics/LinearAlgebra/Complex32/DenseMatrix.cs

@@ -86,7 +86,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new square dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DenseMatrix(int order)
@@ -97,7 +96,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DenseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Complex32/DenseVector.cs

@@ -73,7 +73,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new dense vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public DenseVector(int length)

src/Numerics/LinearAlgebra/Complex32/DiagonalMatrix.cs

@@ -74,7 +74,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new square diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DiagonalMatrix(int order)
@@ -85,7 +84,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns)
@@ -96,7 +94,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All diagonal cells of the matrix will be initialized to the provided value, all non-diagonal ones to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns, Complex32 diagonalValue)

src/Numerics/LinearAlgebra/Complex32/SparseMatrix.cs

@@ -70,7 +70,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new square sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public SparseMatrix(int order)
@@ -81,7 +80,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public SparseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Complex32/SparseVector.cs

@@ -69,7 +69,6 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// <summary>
         /// Create a new sparse vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public SparseVector(int length)

src/Numerics/LinearAlgebra/CreateMatrix.cs

@@ -165,7 +165,6 @@ namespace MathNet.Numerics.LinearAlgebra
         /// <summary>
         /// Create a new dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         public static Matrix<T> Dense<T>(int rows, int columns)
             where T : struct, IEquatable<T>, IFormattable
@@ -824,6 +823,63 @@ namespace MathNet.Numerics.LinearAlgebra
             return Matrix<T>.Build.SparseOfMatrixArray(matrices);
         }
 
+        /// <summary>
+        /// Create a new sparse matrix from a coordinate format.
+        /// This new matrix will be independent from the given arrays.
+        /// A new memory block will be allocated for storing the matrix.
+        /// </summary>
+        /// <param name="rows">The number of rows.</param>
+        /// <param name="columns">The number of columns.</param>
+        /// <param name="valueCount">The number of stored values including explicit zeros.</param>
+        /// <param name="rowIndices">The row index array of the coordinate format.</param>
+        /// <param name="columnIndices">The column index array of the coordinate format.</param>
+        /// <param name="values">The data array of the coordinate format.</param>
+        /// <returns>The sparse matrix from the coordinate format.</returns>
+        /// <remarks>Duplicate entries will be summed together and explicit zeros will be not intentionally removed.</remarks>
+        public static Matrix<T> SparseFromCoordinateFormat<T>(int rows, int columns, int valueCount, int[] rowIndices, int[] columnIndices, T[] values)
+            where T : struct, IEquatable<T>, IFormattable
+        {
+            return Matrix<T>.Build.SparseFromCoordinateFormat(rows, columns, valueCount, rowIndices, columnIndices, values);
+        }
+
+        /// <summary>
+        /// Create a new sparse matrix from a compressed sparse row format.
+        /// This new matrix will be independent from the given arrays.
+        /// A new memory block will be allocated for storing the matrix.
+        /// </summary>
+        /// <param name="rows">The number of rows.</param>
+        /// <param name="columns">The number of columns.</param>
+        /// <param name="valueCount">The number of stored values including explicit zeros.</param>
+        /// <param name="rowPointers">The row pointer array of the compressed sparse row format.</param>
+        /// <param name="columnIndices">The column index array of the compressed sparse row format.</param>
+        /// <param name="values">The data array of the compressed sparse row format.</param>
+        /// <returns>The sparse matrix from the compressed sparse row format.</returns>
+        /// <remarks>Duplicate entries will be summed together and explicit zeros will be not intentionally removed.</remarks>
+        public static Matrix<T> SparseFromCompressedSparseRowFormat<T>(int rows, int columns, int valueCount, int[] rowPointers, int[] columnIndices, T[] values)
+            where T : struct, IEquatable<T>, IFormattable
+        {
+            return Matrix<T>.Build.SparseFromCompressedSparseRowFormat(rows, columns, valueCount, rowPointers, columnIndices, values);
+        }
+
+        /// <summary>
+        /// Create a new sparse matrix from a compressed sparse column format.
+        /// This new matrix will be independent from the given arrays.
+        /// A new memory block will be allocated for storing the matrix.
+        /// </summary>
+        /// <param name="rows">The number of rows.</param>
+        /// <param name="columns">The number of columns.</param>
+        /// <param name="valueCount">The number of stored values including explicit zeros.</param>
+        /// <param name="rowIndices">The row index array of the compressed sparse column format.</param>
+        /// <param name="columnPointers">The column pointer array of the compressed sparse column format.</param>
+        /// <param name="values">The data array of the compressed sparse column format.</param>
+        /// <returns>The sparse matrix from the compressed sparse column format.</returns>
+        /// <remarks>Duplicate entries will be summed together and explicit zeros will be not intentionally removed.</remarks>
+        public static Matrix<T> SparseFromCompressedSparseColumnFormat<T>(int rows, int columns, int valueCount, int[] rowIndices, int[] columnPointers, T[] values)
+            where T : struct, IEquatable<T>, IFormattable
+        {
+            return Matrix<T>.Build.SparseFromCompressedSparseColumnFormat(rows, columns, valueCount, rowIndices, columnPointers, values);
+        }
+
         /// <summary>
         /// Create a new diagonal matrix straight from an initialized matrix storage instance.
         /// The storage is used directly without copying.
@@ -839,7 +895,6 @@ namespace MathNet.Numerics.LinearAlgebra
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         public static Matrix<T> Diagonal<T>(int rows, int columns)
             where T : struct, IEquatable<T>, IFormattable
@@ -950,4 +1005,4 @@ namespace MathNet.Numerics.LinearAlgebra
             return Matrix<T>.Build.DiagonalOfDiagonalArray(rows, columns, diagonal);
         }
     }
-}
+}

src/Numerics/LinearAlgebra/Double/DenseMatrix.cs

@@ -84,7 +84,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new square dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DenseMatrix(int order)
@@ -95,7 +94,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DenseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Double/DenseVector.cs

@@ -72,7 +72,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new dense vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public DenseVector(int length)

src/Numerics/LinearAlgebra/Double/DiagonalMatrix.cs

@@ -72,7 +72,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new square diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DiagonalMatrix(int order)
@@ -83,7 +82,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns)
@@ -94,7 +92,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All diagonal cells of the matrix will be initialized to the provided value, all non-diagonal ones to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns, double diagonalValue)

src/Numerics/LinearAlgebra/Double/SparseMatrix.cs

@@ -68,7 +68,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new square sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public SparseMatrix(int order)
@@ -79,7 +78,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public SparseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Double/SparseVector.cs

@@ -69,7 +69,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// <summary>
         /// Create a new sparse vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public SparseVector(int length)

src/Numerics/LinearAlgebra/Single/DenseMatrix.cs

@@ -84,7 +84,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new square dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DenseMatrix(int order)
@@ -95,7 +94,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new dense matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DenseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Single/DenseVector.cs

@@ -73,7 +73,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new dense vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public DenseVector(int length)

src/Numerics/LinearAlgebra/Single/DiagonalMatrix.cs

@@ -72,7 +72,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new square diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public DiagonalMatrix(int order)
@@ -83,7 +82,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns)
@@ -94,7 +92,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new diagonal matrix with the given number of rows and columns.
         /// All diagonal cells of the matrix will be initialized to the provided value, all non-diagonal ones to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public DiagonalMatrix(int rows, int columns, float diagonalValue)

src/Numerics/LinearAlgebra/Single/SparseMatrix.cs

@@ -69,7 +69,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new square sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the order is less than one.</exception>
         public SparseMatrix(int order)
@@ -80,7 +79,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new sparse matrix with the given number of rows and columns.
         /// All cells of the matrix will be initialized to zero.
-        /// Zero-length matrices are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If the row or column count is less than one.</exception>
         public SparseMatrix(int rows, int columns)

src/Numerics/LinearAlgebra/Single/SparseVector.cs

@@ -69,7 +69,6 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// <summary>
         /// Create a new sparse vector with the given length.
         /// All cells of the vector will be initialized to zero.
-        /// Zero-length vectors are not supported.
         /// </summary>
         /// <exception cref="ArgumentException">If length is less than one.</exception>
         public SparseVector(int length)

src/Numerics/LinearAlgebra/Storage/SparseCompressedRowMatrixStorage.cs

@@ -315,7 +315,7 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
                     {
                         if (ColumnIndices[index] == col)
                         {
-                            val = builder.AddEntries(val, Values[index]);
+                            val = builder.Add(val, Values[index]);
                             index++;
                         }
                         else