A comment on ''ghosts and geometry''

Recent attempts at geometric interpretations of Feynman-De Witt-Faddeev-Popov ghosts and Becchi-Rouet Stora symmetries of gauge theories are reviewed critically, and an interpretation in terms of the infinite-dimensional group of gauge transformations is restated. This interpretation seems adequate both in the path-integral approach and in canonical quantization with indefinite metric. (orig.)