de Travail du Centre d ’ Economie de la Sorbonne On the continuous representation of quasi - concave mappings by their upper level sets Philippe BICH 2009
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چکیده
we provide a continuous representation of quasi-concave mappings by their upper level sets. A possible motivation is the extension to quasi-concave mappings of a result by Ulam and Hyers, which states that every approximately convex mapping can be approximated by a convex mapping. Keyword: quasi-concave, upper level set AMS classification: 47N10
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تاریخ انتشار 2009