Mengenlehre

Mengenlehre, or set theory, is the branch of mathematics that studies collections of objects, called sets. It provides a foundational framework for understanding and organizing mathematical concepts by defining how sets are formed, how they relate to each other, and how to perform operations like union, intersection, and difference. Set theory helps clarify ideas about infinity, size, and relationships among objects, serving as the basis for much of modern mathematics. It’s a way to analyze and formalize how groups of things can be combined, compared, and categorized systematically.