Set theory is a mathematical abstract concerned with the grouping of sets of numbers that have commonality. For example, all even numbers make up a set, and all odd numbers comprise a set. All numbers ...
This is a preview. Log in through your library . Abstract In this paper we present some basic problems of the metric fixed point theory (existence, uniqueness, set-theoretic aspects (Bessaga, Janos, ...
A Platonistic set theory with a universal set, CUSɩ, in the spirit of Alonzo Church's "Set Theory with a Universal Set," is presented; this theory uses a different sequence of restricted equivalence ...
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