  Planar N=4 SYM theory and QCD share the gluon sector, suggesting the
investigation of Gribov-Lipatov reciprocity in the supersymmetric theory. Since
the AdS/CFT correspondence links N=4 SYM and superstring dynamics on AdS5xS5,
reciprocity is also expected to show up in the quantum corrected energies of
certain classical string configurations dual to gauge theory twist-operators.
We review recent results confirming this picture and revisiting the old idea of
Gribov-Lipatov reciprocity as a modern theoretical tool useful for the study of
open problems in AdS/CFT.
