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The free loop space and the algebraic k-theory of spaces
Authors:G E Carlsson  R L Cohen  T Goodwillie and W c Hsiang
Institution:(1) University of California, San Diego, La Jolla, California, USA;(2) Stanford University, Stanford, California, USA;(3) Harvard University, Cambridge, Massachusetts, USA;(4) Princeton University, Princeton, New Jersey, USA
Abstract:Let A(X) be the space defined by Waldhausen whose homotopy groups define the algebraic K-groups of the space X and let 
$$B(X) = Q\sum (SE^1 {\text{ }} \times  _{S^1 } \Lambda (X))$$
. Here Lambda(X) denotes the free loop space of X and Q denotes the functor OHgrinfinSgrinfin. For X = SgrY, the suspension of a connected space Y, we shall prove that the homotopy fibers Ã(X), B(X) of the maps A(X) rarr A (point), B(X) rarr B (point) are equivalent as infinite loop spaces.
Keywords:Homotopy groups  free loop space
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