Adjoint positivity and embedding conjecture for weakly pseudoconvex complex spaces
Adjoint positivity and embedding conjecture for weakly pseudoconvex complex spaces
Let be a non-compact weakly pseudoconvex complex space of pure dimension , let be a canonical desingularization, and let be a holomorphic line bundle. Assume that is positive. Write for the Grauert–Riemenschneider canonical sheaf. Adjoint positivity and embedding conjecture.
(a) Does there exist an integer such that
is semi-ample?
(b) Does there exist an integer such that
is ample? Furthermore, is
very ample, so that the linear system
gives a holomorphic embedding of into ? This extends the corresponding embedding theorem for smooth non-compact weakly pseudoconvex manifolds to singular complex spaces; the semi-ampleness, ampleness, and embedding assertions remain open in the stated generality.
Sources & referencesView supporting material
Primary source
Yuta Watanabe, “Global embeddings of weakly pseudoconvex complex spaces and refined Runge-type approximation theorems”, arXiv:2512.03572 (2026).
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