Chen–Lewis–Sheng conjecture on rationally equivalent points on complete intersections

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Let X⊂PnX \subset \mathbb{P}^n be a very general complete intersection of multidegree (d1,…,dk)(d_1, \dots, d_k). For p∈Xp \in X, let RX,pR_{X,p} denote the space of points of XX rationally equivalent to pp. Chen–Lewis–Sheng conjecture. For every p∈Xp \in X, RX,pR_{X,p} has dimension at most

2n−k−∑i=1kdi.2n-k-\sum_{i=1}^k d_i.

If 2n−k−∑i=1kdi<02n-k-\sum_{i=1}^k d_i<0, this means that pp is equivalent to no other point of XX. The paper states that it proves the remaining cases of this conjecture, so the conjecture is solved by the results discussed here.

References

Primary source

Eric Riedl and David Yang, “Applications of a grassmannian technique in hypersurfaces”, arXiv:1806.02364 (2018).

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