Vol.21, No.4

  Oscillation and comparison theorems of difference equations with positive and negative coefficients

Author : MING-PO CHEN(陳明博), B. G. ZHANG(張炳根)

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  Approximating the averaging operator

Author : CHENG LEE (李正)

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  On α-starlike functions

Author : MAMORU NUNOKAWA(布川護)

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  A scattering problem in $R^n$

Author : I. ETHEM ANAR and A. OKAY CELEBI

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  Global attractivity and level crossings in a model of haematopoiesis

Author : K. GOPALSAMY and PEI-XUAN WENG(翁佩萱)

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  Properties of certain classes of multivalent functions

Author : YANG DINGGONG(楊定恭)

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