Pullbacks of Crossed Modules and Cat1- Commutative Algebras

In this paper we first review the definitions of crossed module [10], pullback crossed module and cat1-object in the category of commutative algebras. We then describe a certain pullback of cat1- commutative algebras.

Pullbacks of Crossed Modules and Cat1- Commutative Algebras

In this paper we first review the definitions of crossed module [10], pullback crossed module and cat1-object in the category of commutative algebras. We then describe a certain pullback of cat1- commutative algebras.