7 Dec
2004
7 Dec
'04
8:37 a.m.
There is a proof in Peter May's little book and some indication in the survey article by Curtis (but his formaule do not work). Tim, do you mean that the proof Curtis gives is erroneous? It is important for me to know what exactly is wrong there. You see, with Pirashvili we have a note (in Georgian Math. J. 9 (2002) 71-74, and still online at http://arxiv.org/abs/math.AT/0106143) about a generalization of that proof to any Maltsev varieties. Although we needed a slight modification, till this moment I was sure that the original formulæ were also fine. Btw, there was also another proof by Carboni, Kelly and Pedicchio in Appl. Categ. Struct. 1 (1993) 385-421, working for any Maltsev categories. Mamuka Jibladze