Exotic affine space

In algebraic geometry, an exotic affine space is a complex algebraic variety that is diffeomorphic to for some n, but is not isomorphic as an algebraic variety to .[1][2][3] An example of an exotic is the Koras–Russell cubic threefold,[4] which is the subset of defined by the polynomial equation

References

  1. Snow, Dennis (2004), "The role of exotic affine spaces in the classification of homogeneous affine varieties", Algebraic Transformation Groups and Algebraic Varieties: Proceedings of the Conference Interesting Algebraic Varieties Arising in Algebraic Transformation Group Theory Held at the Erwin Schrödinger Institute, Vienna, October 22-26, 2001, Encyclopaedia of Mathematical Sciences, 132, Berlin: Springer, pp. 169–175, doi:10.1007/978-3-662-05652-3_9, MR 2090674.
  2. Freudenburg, G.; Russell, P. (2005), "Open problems in affine algebraic geometry", Affine algebraic geometry, Contemporary Mathematics, 369, Providence, RI: American Mathematical Society, pp. 1–30, doi:10.1090/conm/369/06801, MR 2126651.
  3. Zaidenberg, Mikhail (1995-06-02). "On exotic algebraic structures on affine spaces". arXiv:alg-geom/9506005Freely accessible.
  4. L Makar-Limanov (1996), "On the hypersurface in or a -like threefold which is not ", Israel J Math, 96: 419–429


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