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math.GT2001
The graded cobordism group of codimension-one immersions
Louis Funar, Rosa Gini
The cobordism group of codimension-one immersions in the -manifold has a natural filtration induced by any cellular decomposition. The problem addressed in this p…
math.GT2000
Cobordism of immersions of surfaces in non-orientable 3-manifolds
Rosa Gini
Some properties of non-orientable 3-manifolds are shown. The semi-group of cobordism of immersions of surfaces in such manifolds is computed and proven actually to be a group. Expl…