Mathematics – Complex Variables
Scientific paper
2007-05-04
Pure Appl. Math. Q., 6 (2010), no. 3, Special Issue: In honor of Joseph J. Kohn. Part 1, 843-874
Mathematics
Complex Variables
Dedicated to Joseph J. Kohn on the occasion of his 75th birthday; to appear in a special issue of Pure and Applied Math. Quart
Scientific paper
A complex manifold Y satisfies the Convex Approximation Property (CAP) if every holomorphic map from a neighborhood of a compact convex set K in a complex Euclidean space C^n to Y can be approximated, uniformly on K, by entire maps from C^n to Y. If X is a reduced Stein space and Z is a stratified holomorphic fiber bundle over X all of whose fibers satisfy CAP, then sections of Z over X enjoy the Oka property with (jet) interpolation and approximation. Previously this has been proved by the author in the case when X is a Stein manifold without singularities (Ann. Math., 163 (2006), 689-707, math.CV/0402278; Ann. Inst. Fourier, 55 (2005), 733-751, math.CV/0411048). We also give existence results for holomorphic sections under certain connectivity hypothesis on the fibers. In the final part of the paper we obtain the Oka property for sections of submersions with stratified sprays over Stein spaces.
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