std::valarray::min
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | T min() const; | ||
Computes the minimum value of the elements.
If there are no elements, the behavior is undefined.
The function can be used only if operator< is defined for type T.
Parameters
(none)
Return value
The minimum of the elements.
Example
| This section is incomplete Reason: no example | 
See also
| returns the largest element (public member function) |