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A spectral sequence for orbifold cobordism

Andrés Ángel (2009)

Banach Center Publications

The aim of this paper is to introduce a spectral sequence that converges to the cobordism groups of orbifolds with given isotropy representations. In good cases the E¹-term of this spectral sequence is given by a certain cobordism group of orbibundles over purely ineffective orbifolds which can be identified with the bordism group of the classifying space of the Weyl group of a finite subgroup of O(n). We use this spectral sequence to calculate some cobordism groups of orbifolds for low dimensions,...

Calculation of the avoiding ideal for Σ 1 , 1

Tamás Terpai (2009)

Banach Center Publications

We calculate the mapping H * ( B O ; ) H * ( K 1 , 0 ; ) and obtain a generating system of its kernel. As a corollary, bounds on the codimension of fold maps from real projective spaces to Euclidean space are calculated and the rank of a singular bordism group is determined.

Cobordisme fibré et approximation d’une sous-variété singulière par des sous-variétés C

André Didierjean (1983)

Annales de l'institut Fourier

Dans cet article, on montre comment le cobordisme d’applications et le cobordisme fibré fournissent les obstructions à des problèmes de lissage topologique de singularités avec un lieu singulier compact. On calcule dans le cas des petites dimensions les groupes de cobordisme fibré. Les résultats connus sur le cobordisme fibré ou sur son image dans le cobordisme d’application permettent le calcul d’un certain nombre de ces obstructions.

Cobordisms of fold maps of 2k+2-manifolds into 3 k + 2

Tamás Terpai (2008)

Banach Center Publications

We calculate the group of cobordisms of k-codimensional maps into Euclidean space with no singularities more complicated than fold for a 2k+2-dimensional source manifold in both oriented and unoriented cases.

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