 $$\resizebox{\textwidth}{!}{ $\vcenter{\xymatrix@C=00pt{\scriptstyle{n+0} & \scriptstyle{n} & \scriptstyle{n-0} & \scriptstyle{n-0} \ar@{}[r]|-{\cdots} & \scriptstyle{0} & \scriptstyle{-0}\\ A^{n+0} \times Z \ar@<0.00ex>[r]^-{{\partial}_{n+0}\times 0_{Z}} \ar@<0.00ex>[r]|-{\operatorname{pr}_{n}\times 0_{Z}} \ar@<-0.00ex>[r]_-{\operatorname{pr}_{0}\times 0_{Z}}^-{\vdots} &  A \times Z \ar@<0.00ex>[r]^-{\operatorname{pr}_{Z}} \ar@<-0.00ex>[r]_-{\operatorname{pr}_{Z}}^-{\vdots} &  Z \ar@{=}@<0.00ex>[r] \ar@{=}@<-0.00ex>[r]^-{\vdots} & Z \ar@{}[r]|-{\cdots} & Z \ar@{=}[r] & Z}} $}$$ with ${\partial}_{n+0}