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Natural density and probability, constructively

Maschio Samuele

Reports on Mathematical Logic

2020

Vol. 55

41--59

We give a constructive account of the frequentist approach to probability, by means of natural density. Then we discuss some probabilistic variants of the Limited Principle of Omniscience.

Topology as Faithful Communication Through Relations

Maschio Samuele, Sambin Giovanni

Fundamenta Informaticae

2020

Vol. 176, nr 1

61--78

We present here a new interpretation of topological concepts based on communication. The context that allows us to see this is that of basic pairs, the most elementary structures that allow to present topology. In particular, we prove that the subsets which can be communicated faithfully between the sides of a basic pair are exactly open subsets and closed subsets. We also prove that a relation between two sets of points can be communicated faithfully if and only if it is continuous or open. Finally we introduce new notions of point and of continuous function which are communicable.