English

An induced map between rationalized classifying spaces for fibrations

Algebraic Topology 2018-08-02 v2

Abstract

Let Baut1XB{ aut}_1X be the Dold-Lashof classifying space of orientable fibrations with fiber XX. For a rationally weakly trivial map f:XYf:X\to Y, our strictly induced map af:(Baut1X)0(Baut1Y)0a_f: (Baut_1X)_0\to (Baut_1Y)_0 induces a natural map from a X0X_0-fibration to a Y0Y_0-fibration. It is given by a map between the differential graded Lie algebras of derivations of Sullivan models. We note some conditions that the map afa_f admits a section and note some relations with the Halperin conjecture. Furthermore we give the obstruction class for a lifting of a classifying map h:B(Baut1Y)0h: B\to (Baut_1Y)_0 and apply it for liftings of GG-actions on YY for a compact connected Lie group GG as the case of B=BGB=BG and evaluating of rational toral ranks as r0(Y)r0(X)r_0(Y)\leq r_0(X).

Keywords

Cite

@article{arxiv.1706.03450,
  title  = {An induced map between rationalized classifying spaces for fibrations},
  author = {Toshihiro Yamaguchi},
  journal= {arXiv preprint arXiv:1706.03450},
  year   = {2018}
}

Comments

21 pages

R2 v1 2026-06-22T20:15:33.405Z