%0 Journal Article %T Difficulties in a Kind of Averaging Procedure for Constructing Gauge-invariant Operators out of Gauge-variant Ones %A Wei-Min Sun %A Xiang-Song Chen %A Fan Wang %J Physics %D 2000 %I arXiv %R 10.1016/S0370-2693(00)00562-1 %X We prove that a kind of averaging procedure for constructing gauge-invariant operators(or functionals) out of gauge-variant ones is erroneous and inapplicable for a large class of operators(or functionals). %U http://arxiv.org/abs/hep-th/0005060v1