Wikipedia 10K Redux by Reagle from Starling archive. Bugs abound!!!

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To paraphrase Rudy Rucker: "If the universe is science, and science is physics, and physics is mathematics, and mathematics is set theory, then EVERYTHING IS A SET." Set theory is a branch of mathematics that is concerned with basic notions of objects belonging to sets. Set theory provides a common foundation for many branches of mathematics. Set theory in and of itself is mostly concerned with infinite sets, and the concept of infinity. Concepts in set theory: union, intersection, subset, complement