LU and LU inverse is done

include/numerics/inverse/inverse_gauss_jordan.h

@@ -7,12 +7,13 @@
 
 #include <omp.h>
 
-
 namespace numerics{
 	
 	template <typename T>
    	void inverse_gj(utils::Matrix<T>& A){
-		utils::Matrix<T> B(A.rows(),A.cols(), T{0});
+		//utils::Matrix<T> B(A.rows(),A.cols(), T{0});
+		utils::Matrix<T> B;
+		B.eye(A.rows());
 
 
 		uint64_t icol{0}, irow{0}, rows{A.rows()}, cols{A.cols()};
@@ -36,6 +37,9 @@ namespace numerics{
 					}
 				}
 			}
+			if (big <= T{1e-14}){
+				throw std::runtime_error("utill:inplace_inverse('Gauss-Jordan' - Singular Matrix");
+			}
 			ipiv[icol]++;
 			if (irow != icol){
 				for (uint64_t l = 0; l < rows; l++){ // SWAP