A long ago there was an idea about transformation of the systems of differential equations. An idea consisted in breaking up of the system on blocks, i.e. in transformation of the system to such kind, when she disintegrates on subsystems, in each of that is the system of unknown functions entering simultaneously and under the sign of derivatives, and in right parts. For the systems of linear equations this task decides simply. The decision of such task is equipotent to bringing a matrix over of the system to Jordan form. The block of split system corresponds every cage of Jordan. But this task can be decided differently. I suggest using the special singular matrices - projectors.