Coloured knots and permutations representing 3-manifolds.
Seifert manifolds and (1,1)-knots.
3-manifold spines and bijoins.
We describe a combinatorial algorithm for constructing all orientable 3-manifolds with a given standard bidimensional spine by making use of the idea of bijoin (Bandieri and Gagliardi (1982), Graselli (1985)) over a suitable pseudosimplicial triangulation of the spine.
Crystallizations and other manifold representations.
Crystallizations of generalized Neuwirth manifolds.
Universal coverings of PL-mainfolds via coloured graphs.
Minimal atlases of manifolds
Generalizad Lins-Mandel Spaces and branched coverings of S.
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