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Given a pair of a partial abelian monoid M and a pointed space X , let C M (ℝ ∞ , X ) denote the configuration space of finite distinct points in ℝ ∞ parametrized by the partial monoid X ∧ M . In this note we will show that if M is embedded in a topological abelian group and if we put ± M = { a − b | a , b ∈ M } then the natural map C M (ℝ ∞ , X ) → C ± M (ℝ ∞ , X ) induced by the inclusion M ⊂ ± M is a group completion. This result can be applied to show that for any finite set M such that {0} ⊊ M ⊂ ℤ, C M (ℝ ∞ , X ) is weakly equivalent to the infinite loop space Ω ∞ Σ ∞ X if X is connected.
Forum Mathematicum – de Gruyter
Published: Mar 20, 2007
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