  We propose a unified and simple viewpoint to various evolution equations
appropriate in different kinematic regions. We show that the resummation
technique reduces to the Altarelli-Parisi equation, if the transverse degrees
of freedom of a parton are ignored, to the Balitskii-Fadin-Kuraev-Lipatov
equation, if the momentum fraction of a parton vanishes, and to the
Gribov-Levin-Ryskin equation, if the recombination of gluons is included.
