 1 4 51   Model menu  
   This is a list of available physical models.
Select a model for the further work.
  The QED, 4-fermion, and Standard Model 
are built-in models. The Standard Model is
presented in two gauges, namely,  unitary 
(physical) and 't Hooft-Feynman ones. We 
recommend to use  the 't Hooft-Feynman gauge
for  complicate calculations.
   New user's models can be created with the help
of the "CREATE NEW MODEL" menu function. The first
character in their names is (automatically) typed
as the underscore symbol '_'.
  The user has a possibility  to change contents of
any model. Original version  of any built-in model
can be restored.
