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Theorems for deducing continuity from a function's graph

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  • theorems for deducing continuity from a function's graph (en)
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dbp:mathStatement
  • Let be a linear map between two locally convex Hausdorff spaces and If is the inductive limit of an arbitrary family of Banach spaces, if is a K-analytic space, and if the graph of is closed in then is continuous. (en)
  • A linear operator from a barrelled space to a Fréchet space is continuous if and only if its graph is closed. (en)
  • A closed and bounded linear map from a locally convex infrabarreled space into a complete pseudometrizable locally convex space is continuous. (en)
  • Let be linear map between two locally convex Hausdorff spaces and If is the inductive limit of an arbitrary family of Banach spaces, if is a Souslin space, and if the graph of is a Borel set in then is continuous. (en)
  • Also, a closed linear map from a locally convex ultrabarrelled space into a complete pseudometrizable TVS is continuous. (en)
  • Suppose that and are two topological vector spaces with the following property: :If is any closed subspace of and is any continuous map of onto then is an open mapping. Under this condition, if is a linear map whose graph is closed then is continuous. (en)
  • Suppose that is a linear map whose graph is closed. If is an inductive limit of Baire TVSs and is a webbed space then is continuous. (en)
  • If is a linear map between two F-spaces, then the following are equivalent: # is continuous. # has a closed graph. # If in and if converges in to some then # If in and if converges in to some then (en)
  • A closed surjective linear map from a complete pseudometrizable TVS onto a locally convex ultrabarrelled space is continuous. (en)
  • A linear map between two F-spaces is continuous if and only if its graph is closed. (en)
dbp:name
  • Theorem (en)
  • Closed Graph Theorem (en)
  • Borel Graph Theorem (en)
  • Generalized Borel Graph Theorem (en)
dbp:title
  • Proof of closed graph theorem (en)
dbp:urlname
  • ProofOfClosedGraphTheorem (en)
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dct:subject
rdfs:label
  • Closed graph theorem (functional analysis) (en)
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