English

A Hasse diagram for rational toral ranks

Algebraic Topology 2010-10-26 v1

Abstract

Let XX be a simply connected CW complex with finite rational cohomology. For the finite quotient set of rationalized orbit spaces of XX obtained by almost free toral actions, T0(X)={[Yi]}{\mathcal T}_0(X)=\{[Y_i] \}, induced by an equivalence relation based on rational toral ranks, we order as [Yi]<[Yj][Y_i]<[Y_j] if there is a rationalized Borel fibration YiYjBT\QnY_i\to Y_j\to BT^n_{\Q} for some n>0n>0. It presents a variation of almost free toral actions on XX. We consider about the Hasse diagram H(X){\mathcal H}(X) of the poset T0(X){\mathcal T}_0(X), which makes a based graph GH(X)G{\mathcal H}(X), with some examples. Finally we will try to regard GH(X)G{\mathcal H}(X) as the 1-skeleton of a finite CW complex T(X){\mathcal T}(X) with base point X\QX_{\Q}.

Keywords

Cite

@article{arxiv.1010.4841,
  title  = {A Hasse diagram for rational toral ranks},
  author = {Toshihiro Yamaguchi},
  journal= {arXiv preprint arXiv:1010.4841},
  year   = {2010}
}

Comments

15 pages

R2 v1 2026-06-21T16:33:05.424Z