Explicit Ricci-flat Kähler metrics on cones over products of projective spaces are built from gauged linear sigma models whose 'shadow' fields carry negative-signature kinetic terms.
Calabi’s conjecture and some new results in algebraic geometry
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Ricci-flat metrics from gauged linear $\sigma$-models without RG flow
Explicit Ricci-flat Kähler metrics on cones over products of projective spaces are built from gauged linear sigma models whose 'shadow' fields carry negative-signature kinetic terms.