The topological Hochschild homology of the Gaussian integers

This paper gives an explicit calculation of the 2-torsion in the topological Hochschild homology THH of rings of integers in quadratic extensions of the rationals which are rami ed at the prime 2 (Theorem (1.14)). The calculation of the p-torsion in THH of rings of integers in extensions unramied at p can be deduced from Bökstedt’s calculation o