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Wijsman convergence : ウィキペディア英語版
Wijsman convergence
Wijsman convergence is a variation of Hausdorff convergence suitable for work with unbounded sets.
Intuitively, Wijsman convergence is to convergence in the Hausdorff metric as pointwise convergence is to uniform convergence.
==History==

The convergence was defined by Robert Wijsman.〔 〕
The same definition was used earlier by Zdeněk Frolík.〔Z. Frolík, Concerning topological convergence of sets, Czechoskovak Math. J. 10 (1960), 168–180〕
Yet earlier, Hausdorff in in his book ''Grundzüge der Mengenlehre'' defined so called ''closed limits'';
for proper metric spaces it is the same as Wijsman convergence.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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