Measurable selectors for the metric proj
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B. Cascales; M. Raja
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Article
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2003
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John Wiley and Sons
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English
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## Abstract Let __Y__ and __Z__ be two topological spaces and __F__ : __Y__ ร __Z__ โ โ a function that is upper semiโcontinuous in the first variable and lower semiโcontinuous in the second variable. If __Z__ is Polish and for every __y__ โ __Y__ there is a point __z__ โ __Z__ with __F__(__y, z__)