Milnor Hypersurfaces
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Contents |
[edit] 1 Introduction
The Milnor hypersurfaces, denoted , are a family of smooth manifolds that generate (with redundancy) the complex bordism ring.
[edit] 2 Construction and examples
For fixed natural numbers , is defined as the hypersurface in satisfying the equation , where and are homogeneous coordinates for and respectively. This equation defines a generic hyperplane intersecting the image of the Segre embedding transversely.
The role of these manifolds in complex bordism is described on the page Complex bordism.
[edit] 3 Invariants
The signature of the Milnor hypersurfaces is known:
[edit] 4 References
\leq i \leq j$, $H_{ij}$ is defined as the hypersurface in $\CP^i \times \CP^j$ satisfying the equation $x_0z_0 + ... + x_iz_i = 0$, where $x_k$ and $z_k$ are homogeneous coordinates for $\CP^i$ and $\CP^j$ respectively. This equation defines a generic hyperplane intersecting the image of the [[Wikipedia:Segre_embedding|Segre embedding]] $\CP^i \times \CP^j \to \CP^{(i+1)(j+1)-1}$ transversely. The role of these manifolds in complex bordism is described on the page [[Complex bordism#Milnor hypersurfaces|Complex bordism]]. ==Invariants==[edit] 2 Construction and examples
For fixed natural numbers , is defined as the hypersurface in satisfying the equation , where and are homogeneous coordinates for and respectively. This equation defines a generic hyperplane intersecting the image of the Segre embedding transversely.
The role of these manifolds in complex bordism is described on the page Complex bordism.
[edit] 3 Invariants
The signature of the Milnor hypersurfaces is known: