The surgery obstruction groups of the infinite dihedral group

@inproceedings{Connolly2004TheSO,
  title={The surgery obstruction groups of the infinite dihedral group},
  author={Francis X Connolly and James F Davis},
  year={2004}
}
This paper computes the quadratic Witt groups (the Wall L–groups) of the polynomial ring Z[t] and the integral group ring of the infinite dihedral group, with various involutions. We show that some of these groups are infinite direct sums of cyclic groups of order 2 and 4. The techniques used are quadratic linking forms over Z[t] and Arf invariants. AMS Classification numbers Primary: 57R67 Secondary: 19J25, 19G24 
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