ScalingStacks

Corollary 1.13. (see section 10) The set of homotopy classes of natural transformations of additive invariants from connective algebraic $K$-theory to $THH$ is isomorphic to ${\mathbb{Z}}$; furthermore, the topological Dennis trace is characterized up to homotopy as the natural transformation $K\mathchoice{\longrightarrow}{\rightarrow}{\rightarrow}{\rightarrow}THH$ corresponding to the unit $1\in{\mathbb{Z}}$.