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In this paper we introduce the notion of IK-Cauchy function, where I and K are ideals on the same set.
The IK-Cauchy functions are a generalization of I∗-Cauchy sequences and I∗-Cauchy nets. We show how this notion can be used to characterize complete uniform spaces and we study how IK-Cauchy functions and I-Cauchy functions are related. We also define and study IK-divergence of functions.