= Description of model API =

Here we describe the aplication interface of classes that form the `libElegent` library.

== Constants == 

The class `Constants` encapsulates physics and mathematical constants (e.g. proton mass, Euler’s constants) as well as process description (e.g. pp or app mode, centre-of-mass energy). The constants are set up by the static `Init` method which creates an instance of the class referenced by the global pointer `cnts`.


== Hadronic models == 

inheriting `Model`; methods `Amp` and `Prf`



== Coulomb and Coulomb-interference ==



== Generator class ==