57Mxx Low-dimensional topology

• 57M05 Fundamental group, presentations, free differential calculus
• 57M07 Topological methods in group theory
• 57M10 Covering spaces
• 57M12 Special coverings, e.g. branched
• 57M15 Relations with graph theory, See also {05Cxx}
• 57M20 Two-dimensional complexes
• 57M25 Knots and links in $S^3$, {For higher dimensions, See 57Q45}
• 57M30 Wild knots and surfaces, etc., wild embeddings
• 57M35 Dehn's lemma, sphere theorem, loop theorem, asphericity
• 57M40 Characterizations of $E^3$ and $S^3$ (Poincare conjecture), See also {57N12}
• 57M50 Geometric structures on low-dimensional manifolds
• 57M60 Group actions in low dimensions
• 57M99 None of the above but in this section