Copied from PlanetMath's article on injective modules which is under GFDL. The XY-Pic source code for this diagram can be gotten from that page as well.
La bildo estas kopiita de wikipedia:en. La originala priskribo estas: Copied from PlanetMath's [http://planetmath.org/encyclopedia/InjectiveModule.html article on injective modules] which is under GFDL. The XY-Pic source code for this diagram can be