Noninvariance of regularization by dimensional reduction: An explicit example of supersymmetry breaking

By a direct calculation it is shown that at the three-loop level the regularization by dimensional reduction of Avdeev, Chochia and Vladimirov breaks supersymmetry relations between couplings in the N = 1, 2, 4 supersymmetric Yang-Mills theories written in terms of component fields. This is a strong limitation to the scope of the regularization.