Further results on derived sequences.
Further results on primes in small intervals.
Further results on supernumary polylogarithmic ladders.
Further results on the Euler and Genocchi numbers.
Fuzzy distances
In the paper, three different ways of constructing distances between vaguely described objects are shown: a generalization of the classic distance between subsets of a metric space, distance between membership functions of fuzzy sets and a fuzzy metric introduced by generalizing a metric space to fuzzy-metric one. Fuzzy metric spaces defined by Zadeh’s extension principle, particularly to are dealt with in detail.