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What is happening on the second step of left mutation?

Let $X$ be a smooth Gushel-Mukai fourfold, whose semi-orthogonal decomposition is given by $$D^b(X)=\langle\mathcal{K}u(X),\mathcal{O}_X,\mathcal{U}^{\vee}_X,\mathcal{O}_X(H),\mathcal{U}^{\vee}(H)\...
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1 vote
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Dimension of Hilbert scheme of curves on Gushel-Mukai varieties

I have several questions on Hilbert scheme of Gushel-Mukai varieties. Let $X$ be a Gushel-Mukai fourfold and let $\mathcal{H}_3$ be Hilbert scheme of twisted cubics. I was wondering what is the ...
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Is there a direct way to show Fano surface of lines and conics on the pairs of Fano threefolds isomorphic?

I am considering the following setting: Let $(Y_d, X_{4d+2})$ be the pair of degree $d$ and index 2 Fano threefold $Y_d$ and degree $4d+2$ index 1 Fano threefold and both of them are Picard number 1. ...
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1 vote
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Fano surface of conics on Gushel-Mukai threefolds

Let $X$ be a smooth Gushel-Mukai threefold, there are following four cases: $X_1$ is a special Gushel-Mukai with branch locus $\mathcal{B}$ on $Y_5$ general, i.e, it does contain any line or conic. $\...
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