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The adjunction problem over torsion-free groups

Max Forester·Colin Rourke
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Abstract

In this note we prove injectivity and relative asphericity for "layered" systems of equations over torsion-free groups, when the exponent matrix is invertible over Z. We also give elementary geometric proofs of results due to Bogley-Pride and Serre that are used in the proof of the main theorem.

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Max Forester, Colin Rourke. 2005-04-05. The adjunction problem over torsion-free groups. https://doi.org/10.1073/pnas.0502940102

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