shh.homolalg
Interface ExactCategoryObj

All Superinterfaces:
Obj
All Known Implementing Classes:
CochainCx, Qvsp

public interface ExactCategoryObj
extends Obj

An object in an exact category. See ExactCategoryMorphism for facts about exact categories.

Author:
Mark McConnell

Method Summary
 ExactCategoryMorphism getZeroMorphism(ExactCategoryObj source)
          Returns the zero morphism from source to this.
 boolean isZero()
          Whether this is a zero object.
 
Methods inherited from interface Obj
getIdMorphism
 

Method Detail

isZero

public boolean isZero()
Whether this is a zero object.


getZeroMorphism

public ExactCategoryMorphism getZeroMorphism(ExactCategoryObj source)
Returns the zero morphism from source to this.