Homology, Homotopy and Applications

Volume 4 (2002)

Number 1

The Taylor towers for rational algebraic $K$-theory and Hochschild homology

Pages: 191 – 212

DOI: http://dx.doi.org/10.4310/HHA.2002.v4.n1.a11


Miriam Ruth Kantorovitz

Randy McCarthy


We compute the Taylor tower for Hochschild homology as a functor from augmented commutative simplicial $\mathbb{Q}$-algebras, to chain complexes over $\mathbb{Q}$. We use this computation to obtain the layers for the Taylor tower of rational algebraic $K$-theory. We also show that the Hodge decomposition for rational Hochschild homology is the decomposition of the Taylor tower of the augmentation ideal functor into its homogeneous layers when evaluated at a suspension.


Goodwillie calculus, Rational algebraic $K$-theory, Hochschild homology, Hodge decomposition

2010 Mathematics Subject Classification

13D03, 19D55, 55Uxx

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