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Conformal symmetry of QCD in the Wilson-Fisher critical
point in noninteger number of space-time dimensions leads to strong
constraints on the structure of the perturbative expansion and can be used
as a calculational tool.
I describe the basic features of this approach and illustrate its
application on selected problems: operator mixing,
kinematic corrections in off-forward hard processes, B-meson light-cone
distribution amplitude and the relation between soft and rapidity anomalous
dimensions.