Mathematics – Algebraic Topology
Scientific paper
2006-04-03
Bull. Belg. Math. Soc. Simon Stevin 15 (2008) no. 4, 733-768
Mathematics
Algebraic Topology
We correct a misprint in the presentation of the symmetric track groups
Scientific paper
We show that the symmetric track group, which is an extension of the
symmetric group associated to the second Stiefel- Withney class, acts as a
crossed module on the secondary homotopy group of a pointed space. An
application is given to cup-one products in unstable homotopy groups of
spheres, generalizing a formula of Barratt-Jones-Mahowald.
Baues Hans Joachim
Muro Fernando
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