Abstract
Lens spaces arise from free periodic maps in odd-dimensional spheres. They admit free actions of the circle group. We show that such actions bear a certain resemblance to the standard circle actions in odd-dimensional spheres. In particular, the S 1-indices of such actions are the same as those of the corresponding S 1-actions in the spheres. We note, however, that the constructions of in this paper have no analogue in the case of S 3-actions in lens spaces of dimensions of the form 4 n+3.
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