 
 <prompt> Set theory na one branch of mathematical logic wey dey study sets, wey be collections of objects. Although any type of object fit dey collected into a set, set theory dey applied mostly to objects wey dey relevant to mathematics. The language of set theory fit dey used for the definitions of almost all mathematical objects.

The modern study of set theory start with Georg Cantor and Richard Dedekind for the 1870s. After dem discover paradoxes for naive set theory, like Russell's paradox, plenty axiom systems don dey proposed for the early twentieth century, of which the Zermelo–Fraenkel axioms, with or without the axiom of choice, na the best-known.

Set theory dey commonly used as a foundational system for mathematics, especially in the form of Zermelo–Fraenkel set theory with the axiom of choice. Apart from the foundational role, set theory na branch of mathematics on its own, with an active research community. Contemporary research for set theory include plenty topics, wey range from the structure of the real number line to the study of the consistency of large cardinals.

Mathematical topics dey usually come out and evolve through interactions among many researchers. Set theory, however, start with one single paper for 1874 by Georg Cantor: "On a Property of the Collection of All Real Algebraic Numbers". <response>: 1. Na who start the study of set theory?
2. Wen e start?
3. Wetin be set theory?
4. Wetin be sets?
5. Wetin paper wey find set theory?
6. Wen e write?
7. Na who write am?
8. Wetin dey trend for set theory now?
9. Any object fit dey inside set?
10. Wetin dey usually part of set theory?
11. How math topics dey usually start? 