/// <summary>
/// A = -A <=> A[row,col] = -A[row,col]
/// </summary>
/// <param name="A"></param>
/// <returns><i>A</i> (for convenience only).</returns>
public static DoubleMatrix2D Negate(DoubleMatrix2D A)
{
return A.Assign(F1.Mult(-1));
}
/// <summary>
/// A = A * s <=> A[row,col] = A[row,col] * s
/// </summary>
/// <param name="A">the matrix to modify.</param>
/// <param name="s">the scalar; can have any value.</param>
/// <returns><i>A</i> (for convenience only).</returns>
public static DoubleMatrix2D Mult(DoubleMatrix2D A, double s)
{
return A.Assign(F1.Mult(s));
}