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[en] A non-lagrangian approach to gauge symmetries in three dimensions is discussed. The general construction of Lorentz-covariant and local fields carrying massive particles of arbitrary integer spin is presented. The 'minimal' fields for integer spin are explicitly constructed. Following Weinberg's analysis in the 4D case it is shown that the gauge symmetry results from the group-theoretical considerations and the condition that there should-exist a long-range interaction. (orig.)
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