Category#

class discopy.ribbon.Category(ob=None, ar=None)[source]#

Bases: discopy.pivotal.Category, discopy.balanced.Category

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

Parameters
  • ob (type) – The objects of the category, default is Ty.

  • ar (type) – The arrows of the category, default is Diagram.

ob#

alias of Ty

ar#

alias of Diagram