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Subordination and Superordination for Multivalent Functions Associated with the Dziok-Srivastava Operator

Subordination and Superordination for Multivalent Functions Associated with the Dziok-Srivastava Operator

Subordination and superordination preserving properties for multivalent functions in the open unit disk associated with the Dziok-Srivastava operator are derived. Sandwich-type theorems for these multivalent functions are also obtained.