LU and LU inverse is done

include/utils/vector.h

@@ -27,6 +27,7 @@ public:
 	    }
 
 
+
 	    //##########################################################
 		//#            VECTOR: --- basic properties ---            #
 		//##########################################################
@@ -399,13 +400,37 @@ public:
 		void print() const{
 			std::cout << *this << std::endl;
 		}
+
+
+		bool nearly_equal(const Vector<T>& a, T tol = static_cast<T>(1e-9)) const {
+		    if (v.size() != a.size()){
+		    	return false;
+		    }
+		    for (uint64_t i = 0; i < v.size(); ++i){
+		            T val1 = v[i];
+		            T val2 = a[i];
+				if (std::is_floating_point<T>::value) {
+	                if (std::fabs(val1 - val2) > tol) return false;
+	            } else {
+	                if (val1 != val2) return false;
+				}
+			}
+			return true;
+		}
+
+
+
 	};
 
 	typedef Vector<int> Vi;
 	typedef Vector<float> Vf;
 	typedef Vector<double> Vd;
-
-
+/*
+if (std::is_floating_point<T>::value) {
+		                if (std::fabs(a - b) > tol) return false;
+		            } else {
+		                if (a != b) return false;
+}*/
 } // namespace utils
 
 #endif // _vector_n_