A product theorem in dimension
β Scribed by Manuel Castellet
- Publisher
- Springer-Verlag
- Year
- 1972
- Tongue
- French
- Weight
- 129 KB
- Volume
- 128
- Category
- Article
- ISSN
- 0025-5874
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
We adapt and extend work of Barge to show that, under assumptions on the fundamental group alone, an infinite cyclic cover of a 4-dimensional Poincar~ duality complex with Euler characteristic 0 satisfies Poincar~ duality with local coefficients and so is a 3-dimensional Poincar6 duality complex. Th
Given a matroid and an integer n \_> 0, eleven conditions are shown to be equivalent to the validity of the rank formula r(E V F) + r(E A F) = r(E) + r(F) for subspaces satisfying r(E A F) > n. For n = 0 one finds the projective geometries. The case n = 1 also includes the affine and the hyperbolic