Rational homotopy of circle actions

We classify circle actions on F-spaces X with H-od (X; Q) = 0 up to equivar iant rational homotopy equivalence by the concept of g-points in the spectr um of the cohomology ring of Baut(0)(X): In the case of circle actions on c losed oriented manifolds X with the rational cohomology of ag varieties K/T this gives a generalization of the rational homotopy classification of lin ear (or homomorphic) circle actions to nonlinear S-1-actions.