Prove that, if is a retract of , is a retraction, is the inclusion, and is a normal subgroup of , then is the direct product of the subgroups image and kernel .
[So I need to show ]
Prove that, if is a retract of , is a retraction, is the inclusion, and is a normal subgroup of , then is the direct product of the subgroups image and kernel .
[So I need to show ]