In the paper we investigate density type topologies generated by functions \(f\) satisfying condition \(\liminf_{x \gt 0^+} \frac{f(x)}{x}\), which are not generated by any sequence.
In this paper we introduce two topologies on the plane connected with the notions of density and I-density. Their definitions are based on the notion of a regular density point. We investigate connections between them and the density and I-density topologies on the plane and on the real line. We consider axioms of separation and functions continuous with respect to these topologies.
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