We recently wrote about how infinitely large sets are not all the same size as each other, but we were a bit vague about what we meant by a set. The people who invented set theory also started out ...

Mathematics often helps us to think about issues that don’t seem mathematical. One area that has surprisingly far-reaching applications is the theory of sets. Sets are one of the most basic objects in ...

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Set theory is a broad area of mathematics, with many interconnecting themes, and our knowledge is developing rapidly. This international workshop will bring together young mathematicians, providing in ...