It is known that every oriented integral homology 3–sphere can be obtained from S3 by a finite sequence of Borromean surgeries. We give an explicit formula for the variation of the Casson invariant under such a surgery move. The formula involves simple classical invariants, namely the framing, linking number and Milnor’s triple linking number. A more general statement, for n independent Borromean surgeries, is also provided.
Meilhan, Jean-Baptiste  1
@article{10_2140_agt_2008_8_787,
author = {Meilhan, Jean-Baptiste},
title = {Borromean surgery formula for the {Casson} invariant},
journal = {Algebraic and Geometric Topology},
pages = {787--801},
year = {2008},
volume = {8},
number = {2},
doi = {10.2140/agt.2008.8.787},
url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2008.8.787/}
}
Meilhan, Jean-Baptiste. Borromean surgery formula for the Casson invariant. Algebraic and Geometric Topology, Tome 8 (2008) no. 2, pp. 787-801. doi: 10.2140/agt.2008.8.787
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