Lunina's 7-tuples (E 1 , . . . , E 7 ) of sets of pointwise convergence, divergence to ∞, divergence to −∞, etc., for sequences of quasi-continuous functions are characterized. Generalizations on ideal convergence are discussed.
The purpose of this paper is to study a set of convergence points of sequence of real functions from a given class. Here, continuous functions, Borel measurable functions, approximately continuous functions and derivatives are considered.
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