2014
DOI: 10.1112/jlms/jdu065
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Effective results for complex hyperbolic manifolds

Abstract: Abstract. The goal of this paper is to study the geometry of cusped complex hyperbolic manifolds through their compactifications. We characterize toroidal compactifications with non-nef canonical divisor. We derive effective very ampleness results for toroidal compactifications of finite volume complex hyperbolic manifolds. We estimate the number of ends of such manifolds in terms of their volume. We give effective bounds on the number of complex hyperbolic manifolds with given upper bounds on the volume. More… Show more

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Cited by 13 publications
(25 citation statements)
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“…A similar argument is used by Di Cerbo-Di Cerbo to give an improvement to Parker's cusp bound in dimensions 2 [DCDC14] and 3 [DCDC15a]. Note that by (1) we have vol(X) = (4π) n n!…”
Section: Ampleness and Applicationsmentioning
confidence: 69%
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“…A similar argument is used by Di Cerbo-Di Cerbo to give an improvement to Parker's cusp bound in dimensions 2 [DCDC14] and 3 [DCDC15a]. Note that by (1) we have vol(X) = (4π) n n!…”
Section: Ampleness and Applicationsmentioning
confidence: 69%
“…On the other hand, we already know K X + (1 − ǫ)D is ample for small ǫ > 0 (cf. [DCDC15a]). The interior of any line drawn between a point of the nef cone and a point in the ample cone is contained in the ample cone, and K X + tD for t ∈ [1 − n+1 2π , 1 − ǫ] is such a line.…”
Section: Ampleness and Applicationsmentioning
confidence: 99%
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“…where NE(X) K X ≥0 are the points in NE(X) that pair nonnegatively with K X , and where the {C i } are the (possibly countably many) extremal rays. See [DD15,§2] for further details and references.…”
Section: Totally Geodesic (And Other) Punctured Spheresmentioning
confidence: 99%