Groups of unstable Adams operations on p-local compact groups

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A p-local compact group is an algebraic object modelled on the homotopy theory associated with p-completed classifying spaces of compact Lie groups and pcompact groups. In particular p-local compact groups give a unified framework in which one may study p-completed classifying spaces from an algebraic and
homotopy theoretic point of view. Like connected compact Lie groups and pcompact groups, p-local compact groups admit unstable Adams operations - self equivalences that are characterised by their cohomological effect. Unstable Adams operations on p-local compact groups were constructed in a previous paper by F. Junod and the authors. In the current paper we study groups of unstable operations from a geometric and algebraic point of view. We give a precise description of the relationship between algebraic and geometric operations, and show that under some conditions unstable Adams operations are determined by their degree. We also examine a particularly well behaved subgroup of unstable Adams operations.
Original languageEnglish
Pages (from-to)355-418
Number of pages64
JournalAlgebraic & Geometric Topology
Issue number1
Publication statusPublished - 26 Jan 2017


  • pp–local compact groups
  • unstable Adams operations


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