ided Ž. Ž. Ž. is replaced by either or . The subject of regular variation was initiated by Karamata 12 . We refer the reader to 3 for the definitions and properties of different types of regular variation. As defined in 7, set a a a. We say that nnn 1 4a is Oregularly varying quasimonotone if there exist a 0, 2 . nn 1 0
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