Existence of non-hyperplanar (q2+q+1)(q^2+q+1)-ovoids of the parabolic quadric

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Let qq be a prime power greater than 22, and let Q(8,q)\mathcal{Q}(8,q) be the parabolic quadric in projective 88-space. An (q2+q+1)(q^2+q+1)-ovoid is a set of points meeting every generator of Q(8,q)\mathcal{Q}(8,q) in exactly q2+q+1q^2+q+1 points. Non-hyperplanar ovoid conjecture. There exists a (q2+q+1)(q^2+q+1)-ovoid of Q(8,q)\mathcal{Q}(8,q) which is not contained in a hyperplane for every prime power q>2q>2. The claim is verified computationally for q=3,4,5q=3,4,5; the case q=2q=2 is excluded because the computed example is an embedded Q−(7,q)\mathcal{Q}^-(7,q). Existence for all larger prime powers remains open.

References

Primary source

Francesco Pavese and Hanlin Zou, “An infinite family of m-ovoids of the hyperbolic quadrics Q^+(7,q)”, arXiv:2309.06821 (2023).

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