LSLib.LS.Matrix.Invert C# (CSharp) Method

        public Matrix Invert()                                   // Function returns the inverted matrix
        {
            if (L == null) MakeLU();

            Matrix inv = new Matrix(rows, cols);

            for (int i = 0; i < rows; i++)
            {
                Matrix Ei = Matrix.ZeroMatrix(rows, 1);
                Ei[i, 0] = 1;
                Matrix col = SolveWith(Ei);
                inv.SetCol(col, i);
            }
            return inv;
        }

        public static Matrix Power(Matrix m, int pow)           // Power matrix to exponent
        {
            if (pow == 0) return IdentityMatrix(m.rows, m.cols);
            if (pow == 1) return m.Duplicate();
            if (pow == -1) return m.Invert();

            Matrix x;
            if (pow < 0) { x = m.Invert(); pow *= -1; }
            else x = m.Duplicate();

            Matrix ret = IdentityMatrix(m.rows, m.cols);
            while (pow != 0)
            {
                if ((pow & 1) == 1) ret *= x;
                x *= x;
                pow >>= 1;
            }
            return ret;
        }