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Rigidity of hyperstable complexes
Authors:F. E. A. Johnson
Affiliation:(1) Department of Mathematics, University College London, Gower Street, London, WC1E 6BT, United Kingdom
Abstract:
A module J over a ring 
$$bigwedge$$
is said to be hyperstable when 
$$J cong J oplus {bigwedge}^{infty}$$
. Over a module M for which Ext
$$^{n+1}(M, bigwedge) = 0$$
we show that the projective n-stems 
$${mathcal{P}}$$
for which 
$$pi_n({mathcal{P}})$$
is hyperstable constitute a single homotopy type. Received: 17 November 2006
Keywords:Primary 16E05, 55P15  Secondary 55U05
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