4 double Norm_Inf(
const double *vec, 
int n);
     5 double Norm_Inf(
const vector<double>& vec);
     6 double Norm_1(
const double *vec, 
int n);
     7 double Norm_1(
const vector<double>& vec);
    10 double Length(
const double *vec, 
int n);
    11 double Length(
const vector<double>& vec);
    12 double Dot(
const double *vec1, 
const double *vec2, 
int n);
    13 double Dot(
const vector<double>&vec1, 
const vector<double>&vec2);
    14 double Angle(
const double *vec1, 
const double *vec2, 
int n);
    15 double Angle(
const vector<double> &vec1, 
const vector<double>&vec2);    
 double LengthSquare(const double *vec, int n)
double Angle(const double *vec1, const double *vec2, int n)
double Dot(const double *vec1, const double *vec2, int n)
double Norm_1(const double *vec, int n)
double Norm_Inf(const double *vec, int n)
double Length(const double *vec, int n)