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We generalise the work of Segre (Ann Mat Pura Appl 4(70):1–201, 1965), Cameron et al. (J Algebra 55(2):257–280, 1978), and Vanhove (J Algebr Comb 34(3):357–373, 2011) by showing that nontrivial m-ovoids of the dual polar spaces $$\mathsf {DQ}(2d, q)$$ DQ(2d,q) , $$\mathsf {DW}(2d-1,q)$$ DW(2d-1,q) and $$\mathsf {DH}(2d-1,q^2)$$ DH(2d-1,q2) ($$d\geqslant 3$$ d⩾3 ) are hemisystems. We also provide...
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