We classify those compact 3–manifolds with incompressible toral boundary whose fundamental groups are residually free. For example, if such a manifold M is prime and orientable and the fundamental group of M is nontrivial then M≅Σ × S1, where Σ is a surface.
Wilton, Henry  1
@article{10_2140_agt_2008_8_2031,
author = {Wilton, Henry},
title = {Residually free 3{\textendash}manifolds},
journal = {Algebraic and Geometric Topology},
pages = {2031--2047},
year = {2008},
volume = {8},
number = {4},
doi = {10.2140/agt.2008.8.2031},
url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2008.8.2031/}
}
Wilton, Henry. Residually free 3–manifolds. Algebraic and Geometric Topology, Tome 8 (2008) no. 4, pp. 2031-2047. doi: 10.2140/agt.2008.8.2031
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