public Matrix(double[][] m)
{
var rows = m.Length;
var columns = m[0].Length;
_m = new double[rows, columns];
for (int i = 0; i < m.Length; i++)
{
for (int j = 0; j < m[0].Length; j++)
{
_m[i, j] = m[i][j];
}
}
_decomposition = new LU();
}
public Matrix(double[,] m)
{
_m = m.Duplicate();
_decomposition = new LU();
}