2015
DOI: 10.1017/s0013091515000127
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On the homotopy groups of the self-equivalences of linear spheres

Abstract: Let S(V ) be a complex linear sphere of a finite group G. Let S(V ) * n denote the n-fold join of S(V ) with itself and let aut G (S(V ) * ) denote the space of G-equivariant self-homotopy equivalences of S(V ) * n . We show that for any k 1 there exists M > 0 that depends only on V such that |π k aut G (S(V ) * n )| M for all n 0.

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“…Klaus proved that for any k ≥ 1 the groups π k map G (S(U ≤n ), S(U ≤n )), where id is the basepoint, are finite for all sufficiently large n [5, Proposition 2.5]. The author improved this result in [7], giving bounds for their order (uniform in n for each k). However, to establish Theorem 1.1 in its full generality spectral sequences become unmanageable.…”
Section: Introductionmentioning
confidence: 99%
“…Klaus proved that for any k ≥ 1 the groups π k map G (S(U ≤n ), S(U ≤n )), where id is the basepoint, are finite for all sufficiently large n [5, Proposition 2.5]. The author improved this result in [7], giving bounds for their order (uniform in n for each k). However, to establish Theorem 1.1 in its full generality spectral sequences become unmanageable.…”
Section: Introductionmentioning
confidence: 99%