A General izat ion of Concavity for Finite Differences
نویسنده
چکیده
Keywords--Concavity, Finite differences, Green's function. In [1], Gatica, Oliker and Waltman employed concavity to show that if y " ( t ) _< 0, 0 < t < 1, then
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Some concavity properties for general integral operators
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