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2005 Clover calculus for homology 3-spheres via basic algebraic topology
Emmanuel Auclair, Christine Lescop
Algebr. Geom. Topol. 5(1): 71-106 (2005). DOI: 10.2140/agt.2005.5.71


We present an alternative definition for the Goussarov–Habiro filtration of the –module freely generated by oriented integral homology 3–spheres, by means of Lagrangian-preserving homology handlebody replacements (P–surgeries). Garoufalidis, Goussarov and Polyak proved that the graded space (Gn)n associated to this filtration is generated by Jacobi diagrams. Here, we express elements associated to P–surgeries as explicit combinations of these Jacobi diagrams in (Gn)n. The obtained coefficient in front of a Jacobi diagram is computed like its weight system with respect to a Lie algebra equipped with a non-degenerate invariant bilinear form, where cup products in 3–manifolds play the role of the Lie bracket and the linking number replaces the invariant form. In particular, this article provides an algebraic version of the graphical clover calculus developed by Garoufalidis, Goussarov, Habiro and Polyak. This version induces splitting formulae for all finite type invariants of homology 3–spheres.


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Emmanuel Auclair. Christine Lescop. "Clover calculus for homology 3-spheres via basic algebraic topology." Algebr. Geom. Topol. 5 (1) 71 - 106, 2005.


Received: 9 February 2004; Accepted: 28 December 2004; Published: 2005
First available in Project Euclid: 20 December 2017

zbMATH: 1072.57008
MathSciNet: MR2135546
Digital Object Identifier: 10.2140/agt.2005.5.71

Primary: 57M27
Secondary: 57N10

Rights: Copyright © 2005 Mathematical Sciences Publishers


Vol.5 • No. 1 • 2005
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