Double Veronese cones with terminal Gorenstein singularities admit sharp bounds on nodes, with a Q-factorial example having 21 nodes, plus criteria for rationality and unirationality.
Minimal models of canonical 3 -folds
2 Pith papers cite this work. Polarity classification is still indexing.
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Proves the compactly supported symplectic mapping class group of conifold smoothing X splits off an infinite-rank free group and classifies spherical objects in D(Y) for the conifold resolution.
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Double Veronese cones with singularities
Double Veronese cones with terminal Gorenstein singularities admit sharp bounds on nodes, with a Q-factorial example having 21 nodes, plus criteria for rationality and unirationality.
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Symplectomorphisms and spherical objects in the conifold smoothing
Proves the compactly supported symplectic mapping class group of conifold smoothing X splits off an infinite-rank free group and classifies spherical objects in D(Y) for the conifold resolution.