Archiv der Mathematik

, Volume 97, Issue 5, pp 495–497 | Cite as

A note on the degree of symmetry of exotic spheres

  • L. D. Sperança


We use an explicit generator of π 6(S 3) to construct a homotopy 10-sphere with an effective SO(4) action that does not bound a parallelizable manifold.

Mathematics Subject Classification (2010)

Primary 57S15 Secondary 57R60 


Smooth actions Exotic spheres 


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Copyright information

© Springer Basel AG 2011

Authors and Affiliations

  1. 1.IMECC-UnicampCidade UniversitáriaCampinasBrazil

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