Abstract
Consider the smooth quadric Q 6 in ℙ7. The middle homology group H 6(Q 6, ℤ) is isomorphic to ℤ ⊕ ℤ, with a basis given by two classes of linear subspaces. We classify all threefolds of bidegree (1, p) inside Q 6.
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Borisov, L., Viaclovsky, J. Threefolds of order one in the six-quadric. Proc. Steklov Inst. Math. 264, 18–29 (2009). https://doi.org/10.1134/S0081543809010039
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DOI: https://doi.org/10.1134/S0081543809010039