Abstract
We show that the Zariski closure of the set of hypersurfaces of degree M in \(\mathbb{P}^{M}\), where M ≥ 5, which are either not factorial or not birationally superrigid, is of codimension at least \(\binom{M - 3}{2} + 1\) in the parameter space.
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Eckl, T., Pukhlikov, A. (2014). On the Locus of Nonrigid Hypersurfaces. In: Cheltsov, I., Ciliberto, C., Flenner, H., McKernan, J., Prokhorov, Y., Zaidenberg, M. (eds) Automorphisms in Birational and Affine Geometry. Springer Proceedings in Mathematics & Statistics, vol 79. Springer, Cham. https://doi.org/10.1007/978-3-319-05681-4_7
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