Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-07T06:30:22.496Z Has data issue: false hasContentIssue false

Detecting exotic structures via the Pontrjagin-Thom construction

Published online by Cambridge University Press:  26 February 2010

M. A. Guest
Affiliation:
Department of Mathematics, University of Rochester, Rochester, NY 14627. U.S.A.
E. Micha
Affiliation:
Department de Mathemátics, CIEA-IPN, Apartado Postal 14740, Mexico 07000 D.F.,. Mexico.
Get access

Abstract

Kreck and Stolz recently exhibited exotic structures on a family of seven dimensional homogeneous spaces which are quotients of the compact Lie group SU3. We observe that there is an invariant obtained via the Pontrjagin–Thorn construction which detects these exotic structures in many cases.

MSC classification

Type
Research Article
Copyright
Copyright © University College London 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Adams, J. F.. On the groups J(X) IV.. Topology, 5 (1966), 2171.CrossRefGoogle Scholar
2.Atiyah, M. F.. Collected Works, Vol.II Oxford Univ, Press, (1987).Google Scholar
3.Atiyah, M. F. and Smith, L.. Compact Lie groups and the stable homotopy of spheres. Topology, 13 (1974), 135142.CrossRefGoogle Scholar
4.Eschenburg, J.-H.. New examples of manifolds with strictly positive curvature. Invent. Math., 66 (1982), 469480.CrossRefGoogle Scholar
5.Kreck, M. and Stolz, S.. Some homeomorphic but not diffeomorphic 7–manifolds with positive sectional curvature.. Jour. Diff. Geom., 33 (1991), 465486.Google Scholar
6.Löffler, P. and Smith, L.. Line bundles over framed manifolds. Math Zeit., 138 (1974), 3552.CrossRefGoogle Scholar
7.Milnor, J.. Topology from the Differentiable Viewpoint. (Univ. Press of Virginia, Charlottesville, 1965).Google Scholar
8.Milnor, J.. On manifolds homeomorphic to the 7–sphere.. Ann. of Math., 64 (1956), 399405.CrossRefGoogle Scholar
9.Rees, E.. Framings on hypersurfaces. Jour. Lond. Math. Soc., 22 (1980), 161167.CrossRefGoogle Scholar
10.Scheerer, S.. Homotopieäquivalente kompakte Liesche Gruppen. Topology, 7 (1968), 227232.CrossRefGoogle Scholar
11.Toda, H.. A note on compact semi-simple Lie groups. Japan J. Math., 2 (1976), 355359.CrossRefGoogle Scholar
12.Urakawa, H.. Numerical computations of the spectra of the Laplacian on 7–dimensional homogeneous manifolds SU(3)/T(k, I).. SI AM J. Math. Anal., 15 (1984), 979987.CrossRefGoogle Scholar
13.Wang, M. Y.. Some examples of homogeneous Einstein manifolds in dimension 7. Mich. Math. Jour., 49 (1982), 2328.Google Scholar