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SMALL BANACH BUNDLES AND MODULES

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Abstract

We characterize those continuously-normed Banach bundles E → X with compact Hausdorff base whose spaces Γ(E) of global continuous sections are topologically finitely-generated over the function algebra C(X), answering a question of I. Gogić and extending analogous work for metrizable X. Conditions equivalent to topological finite generation include: (a) the requirement that E be locally trivial and of finite type along locally closed and relatively Fσ strata in a finite stratification of X; (b) the decomposability of arbitrary elements in ℓp(Γ(E)), 1 ≤ p < ∞ as sums of ≤ N products in ℓp(C(X)) · Γ(E) for some fixed N; (c) the analogous decomposability requirement for maximal Banach-module tensor products F ⊗ C(X)Γ(E) or (d) equivalently, only for F = ℓ1(C(X)).

Original languageEnglish
Pages (from-to)3907-3920
Number of pages14
JournalProceedings of the American Mathematical Society
Volume153
Issue number9
DOIs
StatePublished - Sep 2025

Keywords

  • Banach bundle
  • Banach module
  • Fσ set
  • G set
  • Hilbert bundle
  • Hilbert module
  • convex module
  • finitely-generated
  • metric space
  • non-degenerate
  • paracompact
  • projective tensor product
  • section
  • semicontinuous
  • sheaf
  • stratification
  • ℓ-sum

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