Contents
Preface ix
List of Conference Talks xi
List of Participants xiii
L-complete Hopf algebroids and their comodules
A. Baker 1
The lattice path operad and Hochschild cochains
M. A. Batanin and C. Berger 23
Open-closed field theories, string topology, and Hochschild homology
A. J. Blumberg, R. L. Cohen, and C. Teleman 53
Cellular covers of divisible abelian groups
W. Chacholski,
´
E. D. Farjoun, R. Gobel,
¨
and Y. Segev 77
Some geometric properties of the Witten genus
A. Dessai 99
Localization and cellularization of principal fibrations
W. G. Dwyer and E. D. Farjoun 117
Operadic cobar constructions, cylinder objects and homotopy morphisms of
algebras over operads
B. Fresse 125
Involutions on the rational K-theory of group rings of finite groups
B. Jahren 189
A quick trip through localization
J. A. Neisendorfer 203
Divided power structures and chain complexes
B. Richter 237
vii
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