RCD compactness and homeomorphism conjecture for singular Kähler spaces
RCD compactness and homeomorphism conjecture for singular Kähler spaces
Let be an -dimensional projective variety with log terminal singularities, and let be a smooth Kähler metric on . Let , so that , and let be the metric measure space induced by as in Definition. RCD conjecture. For any , the metric measure space is a compact space homeomorphic to the projective variety itself. The conjecture proposes that the pluripotential-theoretic Ricci lower bound defining yields an RCD structure and that the metric completion retains the topology of the underlying projective variety; the statement is presented as a conjecture, with no resolution given here.
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Primary source
Xin Fu, Bin Guo and Jian Song, “RCD structures on singular Kahler spaces of complex dimension three”, arXiv:2503.08865 (2025).
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