Published as

T. Van der Linden,Additional comments (with thanks to George Peschke)Simplicial homotopy in semi-abelian categories, J. K-Theory4(2009), no. 2, 379-390.

Preprint arXiv:math/0607076

The homology part of Lemma 3.4 is (clearly!) only valid for indexesnbigger than0. As a consequence, the induction in the proof of Proposition 3.9 does not get off the ground. Nevertheless, the result is correct. Julia Goedecke fixes the proof with Theorem 3.9 in her articleJ. Goedecke,In this paper the context is also enlarged to a relative setting. My Proposition 3.9 is the special case of her Theorem 3.9 where the classHomology in relative semi-abelian categories, Appl. Categ. Structures21(2012) No. 6, 523-543.

Preprint pdfEconsists of all regular epimorphisms andA_{-1}is zero.

An alternative, more homotopical, approach to the key Theorem 5.6 is given in forthcoming joint work with George Peschke.

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