Functor

class discopy.ribbon.Functor(ob=None, ar=None, cod=None)

Bases: discopy.pivotal.Functor, discopy.balanced.Functor

A ribbon functor is both a pivotal functor and a balanced functor.

Parameters

• ob (Mapping[pivotal.Ty, pivotal.Ty]) – Map from atomic pivotal.Ty to cod.ob.

• ar (Mapping[Box, Diagram]) – Map from Box to cod.ar.

• cod (Category) – The codomain of the functor.