Universality of Rank 6 Plucker Relations and Grassmann Cone Preserving Maps

Details Universality of Rank 6 Plucker Relations and Grassmann Cone Preserving Maps Universality of Rank 6 Plucker Relations and Grassmann Cone Preserving Maps

2005-10-05

arxiv.org/abs/math/0510093v3

Mathematics

Algebraic Geometry

Scientific paper

The Plucker relations define a projective embedding of the Grassmann variety Gr(k,n). We give another finite set of quadratic equations which defines the same embedding, and whose elements all have rank 6. This is achieved by constructing a certain finite set of linear maps from the pth exterior power of n-dimensional space to the 2nd exterior power of 4-dimensional space and pulling back the unique Plucker relation on the latter. We also give a quadratic equation depending on (p+2) parameters having the same properties.

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