| Specifically, at n = 0 and f (0) = 1 there is 
       Introducing the condition of symmetry of the system in the form 
       we get an equation, containing an unknown function 
              From geometric 
      considerations it follow that the limit of the
      relationship of the band of frequencies to the average frequency of
      rhythm, with the leaning of the rhythm to infinity, is equal 
       Furthermore, let us assume 
       where F (−n) = k (n) F (n) (8) To detect the source of information at frequency f (0), the content and statistical nature of which was previously unknown, it is necessary that search be conducted at least on two sliding frequencies f (−n) and f (n). The relationship between these frequencies is determined by equation (6). Furthermore execution of the following conjunction is necessary: 
       where An and A−n — the same type information taken in frequencies |