Topological Properties of Subsets in Real Numbers 1
Konrad Raczkowski · 1990
this paper. For simplicity, we follow the rules: n, m denote natural numbers, x denotes a set, s, g, g 1 , g 2 , r, p, q denote real numbers, s 1 , s 2 denote sequences of real numbers, and X , Y , Y 1