L'anneau de cohomologie de toutes les variétés de Seifert
arXiv:1202.2818
Abstract
The cohomology ring with coefficients in , where is a prime integer, of a Seifert manifold , orientable or not orientable is obtained from a simplicial decomposition of . Many choices must be made before applying Alexander-Whitney formula to get the cup-products. The most difficult choices are those of liftings from the cellular complex to the simplicial complex when we add the condition to be cocycles.
few typ corrections 20 figures